Leader in secure luxury watch purchases and sales since 2003
We've found 3,053 results for “

Cartier Tank watches


Our Most Popular Models


View

Sort by

Cartier Tank Française Yellow gold 20mm White Roman numerals United States of America, Florida, Miami
TOP
Cartier Tank Franchaise 18k Gold Quartz Mov.
$4,080
Professional dealer
24
US
Cartier Tank Française Steel 28mm Silver Roman numerals United States of America, Michigan, Warren
TOP
Cartier Tank Francaise 2302 Automatic Stainless Steel W51002Q3...
$2,995
Free shipping
Professional dealer
US
Cartier Tank Américaine Steel 45.10mm Silver United States of America, California, San Mateo
TOP
Cartier Tank Américaine 45.10 mm x 26.60 mm Automatic Silver...
$5,429
Free shipping
Professional dealer
4651
US
Cartier Tank Française Steel 28mm Silver Roman numerals United States of America, Florida, Pembroke Pines
TOP
Cartier Tank Francaise date men’s silver guilloche dial...
$2,780
Professional dealer
83
US
Cartier Tank Américaine Rose gold Silver Roman numerals United States of America, Florida, Miami
Cartier Tank Americaine XL Chronograph W2609356 / 2893 18K...
$11,500
Professional dealer
39
US
Cartier Tank MC Rose gold 34mm Silver United States of America, Florida, Sarasota
TOP
Cartier Tank MC 18k Rose Gold Brown Leather Strap Automatic...
$11,450
Free shipping
Professional dealer
1081
US
Cartier Tank Solo Steel 31mm Silver Roman numerals United States of America, Georgia, Alpharetta
Cartier Tank Solo Xl
$4,200
Free shipping
Professional dealer
360
US
Cartier Tank Américaine Yellow gold 45mm Silver Roman numerals United States of America, California, Los Angeles
Cartier Tank Americaine XL JUNO 1740 W26055L1 18K YELLOW GOLD...
$16,700
Professional dealer
97
US
Cartier Tank Louis Cartier White gold 33.7mm White Roman numerals United States of America, New York, New York
TOP
Cartier Tank Louis Cartier
$5,299
Private Seller
 
US
Cartier Tank Française Steel 25mm White Roman numerals United States of America, Texas, Frisco
Cartier Tank Francaise Midsize Stainless Steel 2301 Quartz
$2,499
Professional dealer
25
US
Cartier Tank Divan Steel 38mm Champagne Roman numerals United States of America, New York, Hartsdale
Cartier Divan Large
$2,850
Professional dealer
754
US
Cartier Tank (submodel) Yellow gold 25mm United States of America, Massachusetts, Boston
Cartier Privee Collection Tank Basculante 18K Yellow Gold/Depl...
$31,500
Professional dealer
784
US
Cartier Tank Solo Steel 31mm Silver Roman numerals United States of America, New York, New York
Cartier Tank Solo XL Silver Dial Automatic Steel Mens Watch...
$4,459
Free shipping
Professional dealer
520
US
Cartier Tank MC Steel 44mm United States of America, Texas, Houston
Cartier Tank Mc Wsta0010 44mm X 34.3mm S/s Auto Watch 2017 Card.
$5,850
Professional dealer
80
US
Cartier Tank Américaine Yellow gold 23mm White Roman numerals United States of America, Maryland, Baltimore, MD
Cartier Tank Americaine
$7,254
Professional dealer
437
US
Cartier Tank Solo Yellow gold 28mm Silver
Cartier Tank Solo 18K (0,750) Gelbgold Unisex Gold Ref. W5200004
$5,041
Sold by Chrono24
DE
Cartier Tank Américaine White gold 45mm Grey Arabic numerals United States of America, California, Los Angeles
Cartier Tank Americaine XL 1741 W2605229 18K WHITE GOLD
$9,700
Professional dealer
97
US
Cartier Tank Française Steel 20mm White Roman numerals United States of America, Michigan, Washington
TOP
Cartier Tank Française
$2,125
Private Seller
 
US
Cartier Tank Française Gold/Steel 28mm White Roman numerals United States of America, Texas, Frisco
Cartier Tank Francaise Automatic Yellow Gold & Steel 2302 Two...
$3,899
Professional dealer
25
US
Cartier Tank Américaine White gold 45mm Silver Roman numerals United States of America, New York, Hartsdale
Cartier Tank Americane Chronoflex
$11,500
Professional dealer
754
US
Cartier Tank (submodel) Yellow gold 24mm Roman numerals United States of America, Massachusetts, Boston
Cartier Tank Cintree Dual Time Collection Privee Cartier Paris...
$32,900
Professional dealer
784
US
Cartier Tank (submodel) Steel 25.5mm Blue No numerals United States of America, Georgia, Alpharetta
Cartier Tank Must De Cartier Blue 2021
$5,200
Free shipping
Professional dealer
360
US
Cartier Tank Française Steel 20mm Silver Roman numerals United States of America, Iowa, Des Moines
Cartier Tank Française Small - W51008Q3
$3,250
Free shipping
Professional dealer
1955
US
Cartier Tank Française Steel 28mm White Roman numerals United States of America, New York, NEW YORK
Cartier Tank Française 2302 Automatic
$4,858
Free shipping
Professional dealer
520
US
Cartier Tank Louis Cartier Yellow gold 25.5mm
Cartier Tank Louis 18K (0,750) Gelbgold Herrenuhr Gold Ref....
$7,956
Sold by Chrono24
DE
Cartier Tank Américaine White gold 45.1mm Silver Roman numerals United States of America, California, Los Angeles
Cartier Tank Americaine 1741 18k White Gold with Bracelet
$16,700
Professional dealer
97
US
Cartier Tank Française Yellow gold 25mm Silver Roman numerals United States of America, Maryland, Baltimore, MD
Cartier Tank Francaise 18k Midsize Watch
$5,174
Professional dealer
437
US
Cartier Tank Française Gold/Steel 28mm White Roman numerals United States of America, Texas, Frisco
Cartier Tank Francaise Automatic Stainless Steel 2302 28mm
$3,299
Professional dealer
25
US
Cartier Tank Française Steel 29mm Silver Roman numerals United States of America, New York, Hartsdale
Cartier Tank Francaise Chronograph
$4,300
Professional dealer
754
US
Cartier Tank (submodel) Yellow gold 27mm Roman numerals United States of America, Massachusetts, Boston
Cartier Tank a Vis Privee Collection 18K Yellow Gold W1529451
$26,500
Professional dealer
784
US
Cartier Tank Française Steel White Roman numerals United States of America, Georgia, Alpharetta
Cartier Tank Francaise Wsta0005
$4,100
Free shipping
Professional dealer
360
US
Cartier Tank Française Steel Silver Roman numerals United States of America, Iowa, Des Moines
Cartier Tank Française - W4TA0008
$7,100
Free shipping
Professional dealer
1955
US
Cartier Tank Louis Cartier Yellow gold 30mm United States of America, California, San Diego
Cartier Tank Louis Ref 1140 2 18k Yellow Gold Leather Strap
$6,695
Free shipping
Professional dealer
285
US
Cartier Tank (submodel) Steel 25mm Green
Cartier Tank Must de Cartier Green Dial Edelstahl Damenuhr...
$7,106
Sold by Chrono24
DE
Cartier Tank Américaine Rose gold 45.1mm Silver Roman numerals United States of America, California, Los Angeles
Cartier Tank Americaine W2609156 18K ROSE GOLD LARGE
$9,700
Professional dealer
97
US
Cartier Tank Solo Rose gold 31mm Silver Roman numerals United States of America, California, Newport Beach
Cartier Tank Solo Men's W5200026
$7,750
Professional dealer
204
US
Cartier Tank Américaine White gold 45mm Silver Roman numerals United States of America, New York, Hartsdale
Cartier Tank Americane Chronoflex
$5,650
Professional dealer
754
US
Cartier Tank (submodel) Yellow gold 20mm Roman numerals United States of America, Massachusetts, Boston
Cartier Vintage Tank Cintree 18k Yellow Gold c. 1962
$18,900
Professional dealer
784
US
Cartier Tank (submodel) Steel Red No numerals United States of America, Georgia, Alpharetta
Cartier Tank Must De
$5,450
Free shipping
Professional dealer
360
US
Cartier Tank Française Steel 30mm Silver Roman numerals United States of America, Iowa, Des Moines
Cartier Tank Française - W4TA0009
$8,200
Free shipping
Professional dealer
1955
US
Cartier Tank Américaine White gold 26mm White Roman numerals United States of America, Maryland, Baltimore, MD
Cartier Tank Americaine
$15,548
Professional dealer
437
US
Cartier Tank Vermeil Silver 25.5mm
Cartier Tank Must de Vermeil Datum Silber vergoldet Herrenuhr...
$3,219
Sold by Chrono24
DE
Cartier Tank MC Rose gold 34mm Brown Roman numerals United States of America, New York, NEW YORK
Cartier W5330002 Tank MC Rose Gold Large Model Brown Dial Leather
$15,880
Free shipping
Professional dealer
207
US
Cartier Tank Française Steel 30mm White Roman numerals United States of America, Illinois, Hinsdale
TOP
Cartier Tank Francaise Chronoflex
$2,999
Private Seller
 
US
Cartier Tank Américaine Yellow gold 34mm Silver Roman numerals United States of America, Pennsylvania, Bala Cynwyd
Cartier Tank Americaine W2601556
$4,950
Free shipping
Professional dealer
1600
US
Cartier Tank Américaine White gold 45mm Silver Roman numerals United States of America, New York, Hartsdale
Cartier Tank Americane Chronoflex
$4,950
Professional dealer
754
US
Cartier Tank (submodel) Platinum 27mm Roman numerals United States of America, Massachusetts, Boston
Cartier Privee Collection Tank a Vis CPCP W1539951 Platinum RARE
$32,500
Professional dealer
784
US
Cartier Tank Française Steel 30mm Silver Roman numerals United States of America, Georgia, Alpharetta
Cartier 2021 Tank Francaise
$8,700
Free shipping
Professional dealer
360
US
Cartier Tank Française Steel 28mm Silver Roman numerals United States of America, Florida, Hollywood
Cartier Tank Francaise Automatic Mens Large Stainless Steel...
$3,900
Professional dealer
30
US
Cartier Tank Américaine Yellow gold 23mm White Roman numerals United States of America, Maryland, Baltimore, MD
Cartier Tank Americaine
$6,625
Professional dealer
437
US
Cartier Tank Solo Steel 33mm Silver
Cartier Tank Solo XL Automatik Edelstahl Herrenuhr Ref....
$3,948
Sold by Chrono24
DE
Cartier Tank Louis Cartier Yellow gold 25mm Silver Roman numerals United States of America, Georgia, Atlanta
Cartier Tank Louis 18k Yellow Gold Deployant Buckle Mens Watch...
$7,360
Professional dealer
1302
US
Cartier Tank (submodel) Yellow gold 23mm United States of America, California, San Diego
Cartier Tank 2442 18k Yellow Gold
$5,995
Free shipping
Professional dealer
285
US
Cartier Tank Solo Silver 34.8mm Silver United States of America, Pennsylvania, Bala Cynwyd
Cartier Tank Solo Large Model WSTA0028
$2,450
Free shipping
Professional dealer
1600
US
Cartier Tank Américaine Steel 27mm Silver Roman numerals United States of America, California, Newport Beach
Cartier Tank Americaine WSTA0018
$5,450
Professional dealer
204
US
Cartier Tank (submodel) Yellow gold 26.5mm Roman numerals United States of America, Massachusetts, Boston
Cartier Tank Obus CPCP 18K Yellow Gold
$15,900
Professional dealer
784
US
Cartier Tank (submodel) Steel 33,7mm Green No numerals United States of America, Georgia, Alpharetta
Cartier Tank Must
$5,300
Free shipping
Professional dealer
360
US
Cartier Tank Française 28mm United States of America, Pennsylvania, Philadelphia
Cartier Tank Francaise 8CT Diamond 18k White Gold W50011S3...
$14,900
Professional dealer
126
US
Cartier Tank Française White gold 28mm Silver Roman numerals United States of America, Maryland, Baltimore, MD
Cartier Tank Française
$17,160
Professional dealer
437
US
Cartier Tank Américaine Yellow gold 36.5mm
Cartier Tank Américaine 18K (0,750) Gelbgold Automatik...
$7,713
Sold by Chrono24
DE
Cartier Tank MC Rose gold Silver Roman numerals United States of America, Florida, Hollywood
Cartier Tank MC Mechanical Silver Dial Men's BROWN Leather...
$12,500
Professional dealer
30
US
Cartier Tank (submodel) Yellow gold 24mm White Roman numerals United States of America, Texas, Houston
Cartier Classic Tank Paris w/ Cartier deployment c. 1980's
$7,465
Professional dealer
85
US
Cartier Tank Américaine Yellow gold 27mm Silver Roman numerals United States of America, Pennsylvania, Bala Cynwyd
Cartier Tank Americaine Chronoflex W2601156
$8,950
Free shipping
Professional dealer
1600
US

Cartier Tank: A Beloved Dress Watch

The Cartier Tank is one of the world's most famous and elegant luxury watches for men and women. Created in 1917, its design takes its inspiration from tanks used in the First World War. Fans of vintage timepieces will find a large pre-owned market.

By Chrono24 Last updated on September 11, 2020

This page contains information about:


A Watch With Military Roots

The name of this watch gives away its design inspiration. Created in 1917 during the First World War, Cartier Tank watches may not be the spitting image of their namesake war vehicles, but the resemblance is undeniable. For example, the long lugs call to mind images of tank tracks from that era.

The first Tank had chamfered Roman numerals, which are still present on most models today. Other original details found on modern editions include the railroad minute track and a pair of blue hands—the original lacked a second hand. Thanks to these classic features, the then-unorthodox rectangular case, and linear design, the Tank quickly became a smash hit.

The Tank has undergone many changes over the years. Since its debut, the number of different versions has risen into the hundreds. The various sub-collections bear the names Solo, Américaine, Française, and Anglaise. While these series contain both men's and women's models, Cartier dedicates the Tank MC line solely to men's watches.

Cartier has continually altered the case materials, dial designs, calibers, and bands while maintaining the same basic features. The Tank is available in stainless steel, gold, and other precious metals. Power sources range from precise quartz movements to highly decorated in-house calibers.

Reasons to Buy a Cartier Tank

  • A rectangular case with a distinctive design
  • One of the most famous dress watches from the last few decades
  • Choice of mechanical in-house calibers or quartz movements
  • Stainless steel, gold, and platinum cases
  • His and hers models

Prices at a Glance: Cartier Tank

Model/Reference Price (approx.) Feature(s)
MC, HPI00623 213,000 USD White gold case, diamonds, in-house caliber
Cintrée, HPI01123 83,000 USD Platinum case, diamonds, skeletonized in-house caliber
Tank Anglaise, W5310013 22,500 USD Rose gold case and bracelet, quartz movement
Française, W50002N2 15,000 USD Yellow gold case and bracelet, quartz movement
MC, W5330003 6,300 USD Automatic in-house movement, small seconds
Louis Cartier, W1529756 8,500 USD Yellow gold case, quartz movement
Française, W51005Q4 6,200 USD Two-tone, automatic movement
Américaine, WSTA0018 4,900 USD Automatic, stainless steel case

How much does a Cartier Tank cost?

Stainless steel watches with quartz movements are the most affordable option, with well-maintained pieces demanding about 1,800 USD. Prices for mint-condition models start around 3,000 USD. The next level up contains mechanical stainless steel timepieces. Versions in precious metals like yellow or rose gold or with diamonds require a much larger investment. One of the most expensive editions is the white gold Tank MC ref. HPI00623, which has an official list price of 272,000 EUR (approx. 322,000 USD). That said, you can find plenty of Tank watches made of precious metal and with gemstones for as little as 18,000 USD.


Tank Solo: Entry Into the Tank Collection

The Tank Solo series is a perfect introduction to the Tank family. At 24.4 x 31 mm, the ref. W5200013 is a fantastic women's watch. Its case and bracelet are both made of stainless steel. A precise quartz movement powers this timepiece's two tempered blue hands. Twelve black Roman numerals rest atop the bright white dial. Like most Tank Solos, a synthetic spinel cabochon adorns the crown. You can call a never-worn ref. W5200013 your own for about 2,700 USD. On the other hand, a pre-owned piece will set you back around 2,000 USD.

Another great option is the ref. W5200025. This rose gold timepiece has a slightly larger 27.4 x 34.8-mm case. Cartier also outfits this model with a quartz movement and mounts it on a brown alligator leather strap. Prices for this watch range from 4,000 USD used to 4,900 USD new.


The Most Classic Design: The Tank Louis Cartier

Those interested in a modern watch that closely resembles the original Tank from 1917 should turn to the series named after and worn by the watch's creator: the Tank Louis Cartier. The manufacturer offers this timepiece in yellow, white, and rose gold paired with a leather strap. You can purchase a never-worn ref. WGTA0011 with the manual caliber 8971 MC for roughly 11,000 USD. At 9,000 USD, pre-owned pieces cost a fair bit less. This particular Tank comes in 18-karat yellow gold and measures 25.5 x 33.7 mm.

Those prices begin to climb as soon as a few diamonds enter the mix. One example is the Tank Louis Cartier ref. WJTA0011. Cartier crafts its case and crown out of 18-karat white gold. The watch itself is a dainty 22 x 29.5 mm. A total of 41 diamonds weighing a combined 0.47 carats adorn the case. Inside the case, you'll find the Cartier 8971 MC manual caliber. This model will set you back about 16,500 USD in mint condition but remains a rare sight on the pre-owned market.

The Tank Louis Cartier ref. WT200006 is a 34.9 x 40.4-mm men's watch in 18-karat white gold. Its case shimmers with 43 brilliant-cut diamonds. The silver-colored dial features 12 black Roman numerals and two tempered blue hands, which get their power from the mechanical hand-wound 430 MC caliber. This timepiece comes on a brown alligator leather strap. While used versions are hard to come by, you will find never-worn pieces selling for around 26,500 USD.


Anglaise: The Tank With an Integrated Crown

The most noticeable feature of the Tank Anglaise is its crown, which Cartier integrates into the case. A small bridge protects the upper side from direct contact. These watches are available with quartz or automatic calibers.

The ref. W5310009 is a women's watch with a stainless steel case and bracelet. Measuring 29.8 x 39.2 mm, it is a fantastic size for smaller wrists. An automatic movement powers the date display at 3 o'clock, as well as the central hour, minute, and second hands. Cartier mounts the final watch on a three-piece link bracelet with satin-brushed middle links. Prices for this model fall between 4,200 USD used and 5,600 USD in mint condition.

Those with more luxurious tastes may prefer one of the Tank Anglaise models in 18-karat rose gold. The ref. W5310013 is one such timepiece. Its 22.7 x 30.2-mm case houses a Cartier quartz movement, which drives the tempered blue hour and minute hands. Scratch-resistant sapphire crystal protects the watch from the elements, while a rose gold bracelet holds it securely on the wrist. This timepiece costs about 22,500 USD new. You can save a few thousand dollars by purchasing a pre-owned edition. These watches demand around 15,000 USD.

For something more exclusive, Cartier offers the ref. WT100002. Other than the many diamonds on top of its case, this model is nearly identical to the W5310013. Mint-condition versions change hands for about 28,000 USD. Prices for used watches are much more affordable, coming in at "only" 15,500 USD.


Française: The Modern Tank

The Tank Française series is home to a range of beautiful watches in different materials. Entry-level models are made of stainless steel, have quartz movements, and cost less than 3,600 USD. There are also various two-tone and solid rose or yellow gold editions available. Each timepiece is available with or without diamonds.

For something that exudes simple elegance, consider the quartz ref. W51008Q3. At 20 x 25 mm, its stainless steel case is a great size for more delicate wrists. Cartier combines this watch with a three-piece link stainless steel bracelet. You can purchase this model for between 2,400 and 3,400 USD.

If you like the combination of stainless steel and diamonds, look no further than the W4TA0008. It shares its size and technology with the W51008Q3, but has 24 glittering diamonds running down the sides of its case. Combined, these gemstones weigh 0.49 carats. This version demands around 6,500 USD in mint condition and 5,400 USD pre-owned.

In 18-Karat Gold, With or Without Diamonds

One of the most exclusive Tank Française models bears the reference number WJTA0023. Cartier crafts both its case and bracelet out of 18-karat rose gold. The case measures 25 x 30 mm and is decorated with 27 brilliant-cut diamonds with a total weight of 0.7 carats. You can call this timepiece your own for about 26,000 USD new. Pre-owned pieces are an uncommon sight. At 27,500 USD, its yellow gold counterpart is only slightly more expensive.

Those who are fond of yellow or rose gold but can do without diamonds should look into the refs. WGTA0030 and WGTA0032. These Tanks both sell for around 20,000 USD on Chrono24. There are also smaller editions with the same technology and design available in rose or yellow gold and with or without diamonds. These timepieces measure 20 x 25 mm and cost between 18,000 and 23,000 USD, depending on their condition.

The two-tone ref. W51005Q4 is a slightly larger unisex watch. Its case combines stainless steel and yellow gold and is 28.15 x 36.5 mm. Its power comes from an automatic mechanical movement with central hour and minute hands and a date display at 6 o'clock. The three-piece link bracelet shares that case's two-tone design and has yellow gold elements between each of the stainless steel middle links. This model requires an investment of 6,200 USD in mint condition. Prices for used watches are significantly lower at roughly 3,200 USD.


Prices for a Tank Américaine

The Tank Américaine is longer than the other members of the Tank family. Its domed case comes in your choice of stainless steel or rose, yellow, or white gold. Prices for an Américaine begin around 3,900 USD for quartz-powered models. Gold timepieces studded with precious gemstones can demand ten times as much and sometimes even more.

On the low end of the price range, you'll find the stainless steel ref. WSTA0016 with a quartz movement. Its rectangular case is 19 mm x 34.8 mm and houses a silver-colored dial with twelve Roman numerals. Two tempered blue hands display the hours and minutes. A blue alligator leather strap completes this Tank Américaine. You can purchase a never-worn version for about 3,900 USD. Pre-owned pieces cost about 300 USD less.

The ref. W2620030 features an 18-karat rose gold case that measures 22.6 x 41.6 mm. Its automatic movement powers the central hour, minute, and second hands, as well as the date display at 6 o'clock. Cartier mounts this watch on a brown alligator leather strap. New timepieces sell for around 12,000 USD on Chrono24. If you want a used watch, that price drops to roughly 8,800 USD.

If you're hoping to draw attention to your wrist, the ref. HPI00724 will get the job done. This 18-karat white gold watch's case is 15.2 mm x 27 mm and fully encrusted with diamonds. A total of 451 glittering gemstones weighing a combined 2.12 carats adorn its graceful case and bracelet. Black Roman numerals rest atop a silver-colored dial. The quartz movement beneath sets the tempered blue hour and minute hands in motion. Such a luxurious timepiece comes at a price, namely 47,500 USD in mint condition. You're unlikely to find a pre-owned piece for sale.


Prices for the Tank MC

The Cartier Tank MC is unlike any of the collection's other models. Its square case is much more massive, making it a true men's watch. The stainless steel ref. W5330003 is this series' entry-level model. At its core is the in-house caliber 1904-PS MC. This movement has central hour and minute hands, a small seconds at 6 o'clock, and a date display at 3. Cartier pairs this model with a black alligator leather strap. Its prices range from 4,300 USD pre-owned to 6,200 USD new.

Those who enjoy flashy watches and have deep enough pockets should take a closer look at the HPI00623. Its case and dial are both made of 18-karat white gold and completely covered in baguette-cut diamonds. A sapphire crystal case back provides a view of its refined in-house caliber, the 1904-AU MC. A black alligator leather strap with a diamond-studded folding clasp completes the look. Cartier officially lists this watch for 272,000 EUR (approx. 322,000 USD); however, if you're lucky, you might be able to find one on Chrono24 for under 215,000 USD.

The ref. W5310040 is an 18-karat white gold Tank MC that measures 34.5 x 43.8 mm. Its most impressive feature is the skeletonized manual caliber 9619 MC, which you can observe from above and below. A pair of rose gold sword hands indicate the hours and minutes. Cartier pairs this timepiece with a brown alligator strap with a matching 18-karat rose gold folding clasp. Prices for never-worn models sit around 41,500 USD. At 28,000 USD, a pre-owned piece will put a much smaller dent in your bank account.


Origins of the Tank Collection

There's no mystery surrounding the Tank's origins. General John Pershing (1860-1948) received one of the first Tank watches as a gift in 1918 for commanding the US troops in Europe. Louis Cartier, a descendant of the company's founder, personally gifted Pershing the timepiece in advance of its release. Cartier had developed the watch in 1917 after he saw the first tanks on the front. Some claim he was particularly intrigued by the Renault FT-17, while others cite the British Mark IV as his source of inspiration. In the 1920s, this spectacular new wristwatch significantly contributed to the gradual decline of pocket watches.