Chronometer


"Chronometer" may sound like a fancy name for a normal watch - after all, it just comes from the Greek words for "time" and "measure" - but chronometers are really something quite special. Chronometers are watches, yes, but watches that have been tried and tested and certified to meet exacting precision standards. The COSC in Switzerland determines which watches may actually call themselves "chronometers". More...

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Rolex Oyster Perpetual 36mm Steel Black - 116000 Rolex Oyster Perpetual 36mm Steel Black - 116000 Ref. No. 116000; Steel; Automatic; Condition 0 (unworn); Year 2015; New; With Box; With Papers; Location: United States, NY, New York; Warranty: 2 year International warranty Retail Price: $5,400.00 Size: 36mm Case: 904L... Available immediately $4,600   Watch details Rolex 18k R/G Rose Linen Dial Bombe Lugs Oyster Perpetual 6590 Rolex 18k R/G Rose Linen Dial Bombe Lugs Oyster Perpetual 6590 Ref. No. 6590; Pink gold; Automatic; Condition 2 (fine); Year 1950s; With Box; Location: United Kingdom, London; An 18k Rose Gold Vintage Oyster Perpetual Gents Wristwatch, rose linen dial with applied dagger... Available immediately $7,742   2 Watch details
Patek Philippe 10 Day Power Reserve 18K Yellow Gold Patek Philippe 10 Day Power Reserve 18K Yellow Gold Ref. No. 5100J-001; Yellow gold; Manual winding; Condition 1 (mint); With Box; Location: United States, MA, Boston; This is an 18K yellow gold Patek Philippe Day Power Reserve, 5100J-001. It has a leather strap... Available immediately $40,500   10 Watch details Breitling Transocean Chronograph Unitime 46mm Stainless Steel Breitling Transocean Chronograph Unitime 46mm Stainless Steel Ref. No. AB0510U4/BB62; Steel; Automatic; Condition 1 (mint); Year 2013; With Box; With Papers; Location: United States, FL, Hollywood; This watch comes with the original Breitling Owners Registration Postcard. The Breitling Owners... Available immediately $7,795   2 Watch details Zenith 22.1230.4002/21.C509 Ladies' Star Chronomaster,... Zenith 22.1230.4002/21.C509 Ladies' Star Chronomaster,... Ref. No. 22.1230.4002/21.C509; Pink gold; Automatic; Condition 1 (mint); Location: United States, AZ, Scottsdale; Condition: pre-owned, in mint condition. Box and papers: no box or papers. ... Available immediately $9,500   5 Watch details Ulysse Nardin Maxi Marine Chronometer 263-66-7 Ulysse Nardin Maxi Marine Chronometer 263-66-7 Ref. No. 263-66-7; Steel; Automatic; Condition 1 (mint); With Box; With Papers; Location: United States, PA, Philadelphia; Pre-Owned Ulysse Nardin Maxi Marine Chronometer (263-66-7) self-winding automatic watch, features... Available immediately $4,750   Watch details Breitling Navitimer (old II) 2-tone with Bracelet  MINT Breitling Navitimer (old II) 2-tone with Bracelet MINT Ref. No. D13022; Gold/Steel; Automatic; Condition 1 (mint); Year Circa 2000; With Papers; Location: United States, NY, New York; * COMES WITH SEA WAVE DIAMOND'S 1-YEAR LIMITED WARRANTY* This Navitimer is very hard to... Available immediately $6,250   1 Watch details Rolex Daytona Rose Gold 116505 Pink Dial - Pink Gold Rolex Daytona Rose Gold 116505 Pink Dial - Pink Gold Ref. No. 116505; Pink gold; Automatic; Condition 0 (unworn); Year 2015; New; With Box; With Papers; Location: United Kingdom, London; - Rolex Cosmograph Daytona This is an unworn Rolex Daytona. Model No. 116505. It... Available immediately $28,778   3 Watch details Chopard Mille Miglia GMT Chronometer Speed Black 2 Chopard Mille Miglia GMT Chronometer Speed Black 2 Ref. No. 16.8482-9001; Gold/Steel; Automatic; Condition 1 (mint); With Box; With Papers; Location: United States, NY, New York Available immediately $3,995   3 Watch details
Ulysse Nardin GMT +/- Perpetual, Silver Dial, Limited Edition... Ulysse Nardin GMT +/- Perpetual, Silver Dial, Limited Edition... Ref. No. 322-66/91; Pink gold; Automatic; Location: United States, NY, New York; Super Exclusive & Extremely Rare Ulysse Nardin GMT +/- Perpetual Calendar Limited & Numbered... Available immediately price on request   17 Watch details Rolex 14k Yellow Gold Silver Dial Bubbleback Oyster Perpetual... Rolex 14k Yellow Gold Silver Dial Bubbleback Oyster Perpetual... Ref. No. 6085; Yellow gold; Automatic; Condition 2 (fine); Year 1951; With Box; Location: United Kingdom, London; A Rare 14k Yellow Gold Vintage Bubbleback Oyster Perpetual Gents Wristwatch, silver dial with... Available immediately $8,993   2 Watch details Rolex 18k R/G O/P Silver Baton Dial Day-Date Vintage Gents 1803 Rolex 18k R/G O/P Silver Baton Dial Day-Date Vintage Gents 1803 Ref. No. 1803; Pink gold; Automatic; Condition 1 (mint); Year 1970s; With Box; Location: United Kingdom, London; An 18k Rose Gold Oyster Perpetual Day-Date Vintage Gents Wristwatch, silver dial with applied... Available immediately $18,768   2 Watch details Paul Picot Firshire 3000 Regulator Grey Stainless Steel Paul Picot Firshire 3000 Regulator Grey Stainless Steel Ref. No. 0740.S; Steel; Automatic; Condition 1 (mint); Year 2012; With Box; With Papers; Location: United States, FL, Hollywood; • 37mm x 49mm Tonneau case wears like a 49mm Round Watch. • 100% Complete with Everything as... Available immediately $2,495   2 Watch details Omega Seamaster Professional Chronograph, Yellow Gold Omega Seamaster Professional Chronograph, Yellow Gold Ref. No. Reference: Movement: mechanical, with automatic winding;; Yellow gold; Automatic; Condition 1 (mint); Location: United States, AZ, Scottsdale; Total weight of this piece is approx. 9 ounces (255.15 grams)! Condition: pre-owned,... Available immediately $13,950   5 Watch details Breitling CHRONOMAT EVOLUTION YELLOW GOLD DIAMOND - LIMITED 25... Breitling CHRONOMAT EVOLUTION YELLOW GOLD DIAMOND - LIMITED 25... Ref. No. K1335663/A572; Yellow gold; Automatic; With Box; With Papers; Location: United States, NY, New York City; EXTREMELY RARE & EXCLUSIVE MODEL ~~~ BREITLNG CHRONOMAT EVOLUTION YELLOW GOLD DIAMOND **... Available immediately $33,500   14 Watch details Omega Seamaster Planet Ocean Chrono Black Dial Rubber Mens Watch Omega Seamaster Planet Ocean Chrono Black Dial Rubber Mens Watch Ref. No. 232.32.46.51.01.003; Steel; Automatic; Condition 1 (mint); Location: United States, NY, New York; *COMES WITH SEA WAVE DIAMOND'S 1-YEAR LIMITED WARRANTY* The Omega Seamaster Chrono Coaxial... Available immediately $4,950   1 Watch details Rolex Oyster Perpetual Milgauss Steel - 116400GV-STZB Rolex Oyster Perpetual Milgauss Steel - 116400GV-STZB Ref. No. 116400GV-STZB; Steel; Automatic; Location: United States, NY, New York; Warranty: 2 Year International Warranty Guarantee Retail Price: $8,200.00 Size: 40mm Case:... Available immediately $7,625   Watch details Chopard Mille Miglia "Super Fast" Classic Racing 18kt... Chopard Mille Miglia "Super Fast" Classic Racing 18kt... Ref. No. 161276; Pink gold; Automatic; Condition 1 (mint); Location: United States, NY, New York; * COMES WITH SEA WAVE DIAMOND'S 1-YEAR EXTENDED LIMITED WARRANTY * Price Reduced!!!... Available immediately $17,500   1 Watch details Ulysse Nardin Maxi Marine Chronometer 43mm, Black Dial -... Ulysse Nardin Maxi Marine Chronometer 43mm, Black Dial -... Ref. No. 1183-126-3/42; Steel; Automatic; Location: United States, NY, New York; Ulysse Nardin Marine Chronometer Manufacture 43mm titanium and stainless steel case, black dial... Available immediately $7,725   17 Watch details Rolex Oyster Perpetual 34mm Silver Watch - 114200 Rolex Oyster Perpetual 34mm Silver Watch - 114200 Ref. No. 114200; Steel; Automatic; Location: United States, NY, New York; Warranty: 2 Year International Warranty Retail Price: $5,050.00 Size: 34mm Case: 904L Steel Dial... Available immediately $4,250   Watch details Rolex GMT Master II SS Red / Black Coke Bezel Rolex GMT Master II SS Red / Black Coke Bezel Ref. No. COSC; Steel; Automatic; Condition 1 (mint); Year 2000; With Box; Location: United States, MA, Boston; Rolex 16710 GMT Master II, Stainless Steel on a Stainless Steel Oyster Bracelet, Automatic... Available immediately $5,600   10 Watch details Chopard L.U.C. Qualite Fleurier 161896-5002 Chopard L.U.C. Qualite Fleurier 161896-5002 Ref. No. 161896-5002; Pink gold; Automatic; Condition 0 (unworn); Location: United States, PA, Southampton; Retail Price::  $19,280.00 Limited edition of 300 examples world wide!this exclusive... Available immediately $11,495   2 Watch details Carl F. Bucherer 10614.02 Limited Edition Patravi Tribute to... Carl F. Bucherer 10614.02 Limited Edition Patravi Tribute to... Ref. No. 00.10614.02.33.01; White gold; Automatic; Condition 1 (mint); With Box; Location: United States, AZ, Scottsdale; Extremely Limited Edition of only 50 pieces, worldwide! Condition: pre-owned, in... Available immediately $13,500   5 Watch details Audemars Piguet SCUBA DIVER RED BOUTIQUE ROYAL OAK OFFSHORE... Audemars Piguet SCUBA DIVER RED BOUTIQUE ROYAL OAK OFFSHORE... Ref. No. 15701ST.OO.D002CA.03; Steel; Automatic; Condition 0 (unworn); With Box; With Papers; Location: United States, NY, New York City; AUDEMARS PIGUET SCUBA BOUTIQUE RED "DIVER" - ROYAL OAK OFFSHORE STAINLESS STEEL - LIMITED... Available immediately $18,995   14 Watch details Rolex Daytona 'Everose' Cosmograph Chronograph... Rolex Daytona 'Everose' Cosmograph Chronograph... Ref. No. 116505; Pink gold; Automatic; Condition 1 (mint); Year 2013; With Box; With Papers; Location: United States, FL, Hollywood; • 100% Complete with Everything as Purchased NEW from Authorized Rolex Dealer. ... Available immediately $25,995   2 Watch details Zenith Grande Class Reserve De Marche Dual Time Zenith Grande Class Reserve De Marche Dual Time Ref. No. 03-0520-683-01-C492; Steel; Automatic; Condition 1 (mint); With Box; With Papers; Location: United States, MA, Boston; Zenith 03.0520.683/01.C492 Grande Class Dual Time, 03-0520-683-01-C492, Stainless Steel on a... Available immediately $4,200   10 Watch details Ulysse Nardin Maxi Marine Diver Chronometer 263-33-3/92 Ulysse Nardin Maxi Marine Diver Chronometer 263-33-3/92 Ref. No. 263-33-3/92; Steel; Automatic; Condition 0 (unworn); With Box; With Papers; Location: United States, PA, Southampton; Retail Price::  $7,800.00 The perfect watch for an aquatic enthusiast- the Maxi Marine... Available immediately $4,839   2 Watch details Omega Speedmaster Moonwatch Co-Axial Chronograph, Lacquered... Omega Speedmaster Moonwatch Co-Axial Chronograph, Lacquered... Ref. No. 311.90.44.51.03.001; Titanium; Automatic; Location: United States, NY, New York; The Omega Speedmaster is one of Omega’s most iconic timepieces. Having been a part of all six... Available immediately $8,500   17 Watch details Audemars Piguet JALAN BUKIT BINTANG WALK "KILL BILL"... Audemars Piguet JALAN BUKIT BINTANG WALK "KILL BILL"... Ref. No. 26115TI.OO.D002CR.01; Titanium; Automatic; Condition 0 (unworn); With Box; With Papers; Location: United States, NY, New York City; The Audemars Piguet Royal Oak Offshore - Jalan Bukit Bintang Edition was kicked off with a launch... Available immediately $33,995   14 Watch details Rolex 10k Y/G Very Rare Official Red Semi BubbleBack Datejust... Rolex 10k Y/G Very Rare Official Red Semi BubbleBack Datejust... Ref. No. 6105; Yellow gold; Manual winding; Condition 2 (fine); Year 1951; With Box; Location: United Kingdom, London; An 10k Yellow Gold Official Red Gents Wristwatch, silver dial with applied index batons, date... Available immediately $14,858   2 Watch details
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The Oceanic Origins of Chronometers

Though the Swiss set the standard, the English coined the word. In the quest to calculate the longitude, the Englishman Jeremy Thacker, a clockmaker of extraordinary skill, created a series of increasingly accurate clocks, well beyond what had had previously been achieved. The clocks were intended to be used aboard ships and had to keep absolutely accurate time in order to allow for calculating longitude precisely, and thus fixing the position of the ship in the vast ocean. The last of Thacker's chronometers was actually more like a very large pocket watch.

Other clockmakers - and increasingly watchmakers - copied from and improved upon Thacker's final chronometer, producing watches of greater and greater precision. The original standards for accuracy were actually far more exacting than those currently maintained by the COSC in Switzerland, so very few watches were certified as chronometers and thus very few were actually produced and sold. The original chronometer requirements for mechanical watches are no longer necessary, since digital watches can already exceed them, but chronometers are still manufactured and sold (and resold) today as examples of extremely fine precision engineering. The use of jewels and precious metals in watches owes its origins to chronometers - these materials were used to make the mechanical movements as precise as possible.

Officially Certified Chronometers

Chronometers are no longer rare. More than a million Officially Certified Chronometer certificates are issued each year. Those watches that pass the most rigorous of the COSG's tests are rewarded with a special serial number and, indeed, the right to call themselves "chronometers" at all. Chronometers must meet several requirements: they must display the seconds; they must be highly precise; they must demonstrate that precision over the course of several consecutive days of testing; they must perform precisely in different positions and at different temperatures.

Chronometers in Everyday Use

This may sound extreme, but such reliability was crucial for individuals and groups that had to rely on the precision of portable mechanical timekeepers in the past. Pilots watches, for instance, needed to perform as chronometers (and those that did not had to be hackable). The famous B-Uhren, commissioned by the German Luftwaffe and manufactured by several companies, were chronometer-certified pilots watches - or chronometers that were used as pilots watches, depending on your perspective. Interestingly, despite the many years between Thacker's invention and the production of the B-Uhren, chronometers were still tightly bound to use in navigation.

First at sea, then in the air. And, still today, at sea again - or at least under it. Some diving watches, like the Rolex submariner, are also certified chronometers. Divers must be able to reliably track how long they've been under and how much time they have to surface.

Though their accuracy may have been eclipsed by digital watches, chronometers are still useful today.