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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 Oysterdate Perpetual DateJust Diamond Dial Watch 1601 Rolex Oysterdate Perpetual DateJust Diamond Dial Watch 1601 Ref. No. 1601; Gold/Steel; Automatic; Condition 2 (fine); Year 1973; Location: United Kingdom, WEST MIDLAND; 1) Dial : The Original dial has been repainted with after set Diamond Index attached to it. ( The... Available immediately $3,328   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 $41,500   10 Watch details
Ulysse Nardin Maxi Marine Chronometer 263-66-7/623 Ulysse Nardin Maxi Marine Chronometer 263-66-7/623 Ref. No. 263-66-7/623; Steel; Automatic; Condition 1 (mint); With Box; With Papers; Location: United States, PA, Philadelphia; Pre-Owned Ulysse Nadrin Maxi Marine Chronometer (263-66-7/623) self-winding automatic watch,... Available immediately $5,250   Watch details Breitling H22360 Limited Edition Chrono-Matic 24H, Red Gold Breitling H22360 Limited Edition Chrono-Matic 24H, Red Gold Ref. No. H2236012/B818; Red gold; Automatic; Condition 1 (mint); Location: United States, AZ, Scottsdale; Limited Edition of 250 pieces! Condition: pre-owned, in mint condition. Box... Available immediately $9,950   6 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 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 $4,995   3 Watch details Rolex DEEP SEA JAMES CAMERON DEEP BLUE D-BLUE MODEL: 116660 Rolex DEEP SEA JAMES CAMERON DEEP BLUE D-BLUE MODEL: 116660 Ref. No. 116660; Steel; Automatic; Condition 0 (unworn); New; With Box; With Papers; Location: United Kingdom, London; ROLEX DEEP SEA JAMES CAMERON DEEP BLUE D-BLUE MODEL: 116660 The latest Rolex Deepsea has a... Available immediately $13,763   10 Watch details Chanel J12 White Gem-Set Gold Jewelry - H2138 Chanel J12 White Gem-Set Gold Jewelry - H2138 Ref. No. H2138; Pink gold; Automatic; Location: United States, NY, New York; Warranty: 2 Year International Warranty Size: 41mm Diamonds: 48 baguette-cut diamonds (~4.8... Available immediately price on request   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
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 Rolex Datejust Blue Roman Dial SS Rolex Datejust Blue Roman Dial SS Ref. No. COSC; Steel; Automatic; Condition 1 (mint); Year 2003; With Box; Location: United States, MA, Boston; Rolex 16220 Oyster Perpetual Datejust, Stainless Steel on a Stainless Steel Bracelet, Automatic... Available immediately $3,300   10 Watch details F.P.Journe Octa Automatique Reserve Platinum F.P.Journe Octa Automatique Reserve Platinum Platinum; Automatic; Condition 1 (mint); With Box; Location: United States, MA, Boston; This is a platinum FP Journe Octa Automatique Reserve. It has a leather strap with a platinum... Available immediately $32,500   10 Watch details Ulysse Nardin 322-66 GMT Perpetual, Rose Gold Ulysse Nardin 322-66 GMT Perpetual, Rose Gold Ref. No. 322-66; Red gold; Automatic; Condition 1 (mint); Location: United States, AZ, Scottsdale; Limited Edition of only 500 pieces! Condition: pre-owned, in mint condition. ... Available immediately $22,250   6 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 Ulysse Nardin Maxi Marine Chronometer Lady 266-66B/991 Ulysse Nardin Maxi Marine Chronometer Lady 266-66B/991 Ref. No. 266-66B/991; Pink gold; Automatic; Condition 0 (unworn); Location: United States, PA, Southampton; Retail Price::  $25,800.00 2012 - Ulysse Nardin Maxi Marine Chronometer in the new smaller... Available immediately $17,495   1 Watch details Blancpain 2885F.36B42.53B Leman Flyback Chronograph Men's... Blancpain 2885F.36B42.53B Leman Flyback Chronograph Men's... Pink gold; Automatic; Condition 0 (unworn); Year 2000 to Present; New; With Box; With Papers; Location: United States, NY, New York; Retail Price: $30200 Blancpain 2885F.36B42.53B Leman Flyback Chronograph Men's Watch ... Available immediately $15,700   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 Ulysse Nardin Blue Surf Limited Edition Ulysse Nardin Blue Surf Limited Edition Ref. No. 266-36LE-3A; Pink gold; Automatic; Condition 1 (mint); With Box; With Papers; Location: United States, NY, New York; Limited Edition of 500 pieces Available in 3-5 working days $18,350   3 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 Audemars Piguet Royal Oak Offshore Grand Prix, Limited Edition... Audemars Piguet Royal Oak Offshore Grand Prix, Limited Edition... Ref. No. 26290PO.OO.A001VE.01; Platinum; Automatic; Location: United States, NY, New York; Super Exclusive & Extremely Rare THE ONE & ONLY Audemars Piguet Grand Prix Platinum, Limited &... Available immediately $129,995   17 Watch details Omega Chronometer Omega Chronometer Ref. No. 431.13.41.21.02.001; Steel; Automatic; Location: United States, NY, New York; Weight: 84.5 grams Available immediately $4,299   Watch details Chanel J12 Black Function Chronograph- H0940 Chanel J12 Black Function Chronograph- H0940 Ref. No. H0940; Automatic; Location: United States, NY, New York; Warranty: 2 Year International Warranty Retail Price: $8,600.00 Size: 41mm Dial: Black high-tech... Available immediately $6,050   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 El Toro 322-00-3 Ulysse Nardin El Toro 322-00-3 Ref. No. 322-00-3; Pink gold; Automatic; Condition 0 (unworn); Location: United States, PA, Southampton; Retail Price::  $55,500.00 Ulysse Nardin combined the Moonstruck case with the UN-32... Available immediately $34,995   1 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   6 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); Location: United States, PA, Philadelphia; Pre-Owned Ulysse Nardin Maxi Marine Chronometer (263-66-7) automatic watch, features a 41mm... Available immediately $5,250   Watch details Rolex Oyster Perpetual 36mm Steel Black - 116000 Rolex Oyster Perpetual 36mm Steel Black - 116000 Ref. No. 116000; Steel; Automatic; Location: United States, NY, New York; Warranty: 2 year International warranty Retail Price: $5,400.00 Size: 36mm Case: 904L Steel Dial... Available immediately $4,950   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 Ulysse Nardin Maxi Diver 263-33-3/95 Ulysse Nardin Maxi Diver 263-33-3/95 Ref. No. 263-33-3/95; Steel; Automatic; Condition 0 (unworn); Location: United States, PA, Southampton; Retail Price::  $7,800.00 The deep, burgundy-colored dial of this Maxi Diver timepiece... Available immediately $5,070   1 Watch details Rolex Daytona Everose Black Dial 18K Rose Gold / Bracelet Rolex Daytona Everose Black Dial 18K Rose Gold / Bracelet Ref. No. 116505.; Pink gold; Automatic; Condition 1 (mint); Year 2013; With Box; With Papers; Location: United States, MA, Boston; This is an 18K "Everose" rose gold Rolex Cosmograph Daytona, 116505. It has an integral 18k rose... Available immediately $26,500   10 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.