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 ICONIC ROLEX ZENITH COSMOGRAPH DAYTONA Rolex ICONIC ROLEX ZENITH COSMOGRAPH DAYTONA Ref. No. 16520; Steel; Automatic; Condition 1 (mint); Year 1998; With Box; With Papers; Location: United Kingdom, London; ICONIC ROLEX ZENITH COSMOGRAPH DAYTONA CARR Price £13,500 This is a very rare Rolex Daytona... Available immediately $ 21,808   11 Watch details Rolex Oyster Perpetual DateJust Thunderbird Steel Gold Watch Rolex Oyster Perpetual DateJust Thunderbird Steel Gold Watch Ref. No. 6609; Gold/Steel; Automatic; Condition 2 (fine); Year 1958; Location: United Kingdom, WEST MIDLAND; 1) Dial : The Original Dial has been repainted by an Expert to make it look like New & Flawless.... Available immediately $ 3,229   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 Available immediately $ 48,500   9 Watch details Bulgari Diagono Scuba Bulgari Diagono Scuba Ref. No. SCB 38 S; Steel; Automatic; Condition 2 (fine); Location: United States, NY, new york; This Bvlgari Diagono Scuba Chronograph SCB 38 S Automatic Men's Watch is Pre-owned Box :... Available immediately $ 2,499   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   6 Watch details Ulysse Nardin Maxi Marine Chronometer Ulysse Nardin Maxi Marine Chronometer Ref. No. 266-66; Pink gold; Automatic; Condition 1 (mint); With Box; With Papers; Location: United States, NY, New York; NY Luxury watches inc 31-29 west 47th street mezzanine floor, M8 New York, NY 10036 United States... Available immediately $ 10,900   2 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 stainless steel Submariner Chronometer Rolex stainless steel Submariner Chronometer Steel; Condition 1 (mint); Location: United States, MA, Boston; Rolex stainless steel Submariner Chronometer,40mm -Rolex 14060m,bezel engraved no date Sub G... Available immediately $ 5,500   3 Watch details Breitling Bentley Motors GT A1336212/C649 Breitling Bentley Motors GT A1336212/C649 Ref. No. A1336212/C649; Steel; Automatic; Condition 1 (mint); With Box; With Papers; Location: United States, PA, Philadelphia; This watch comes complete with box and papers. We back the watch with a 15-month warranty! Available immediately $ 5,250   Watch details
Omega De Ville Ladymatic Co-Axial 42563342 Omega De Ville Ladymatic Co-Axial 42563342 Ref. No. 425.63.34.20.55.002; Yellow gold; Automatic; Condition 0 (unworn); Year 2014; New; With Box; With Papers; Location: United Kingdom, Wilmslow; The OMEGA Ladymatic is a mesmerizing blend of extraordinary design and truly innovative... Available immediately $ 11,300   1 Watch details Ulysse Nardin Marine Chronometer Manufacture 1183-126-3/61 Ulysse Nardin Marine Chronometer Manufacture 1183-126-3/61 Ref. No. 1183-126-3/61; Steel; Automatic; Condition 0 (unworn); New; With Box; With Papers; Location: United States, PA, Southampton; Retail Price::  $10,300.00 The functions of this uniquely masculine Ulysse Nardin Marine... Available immediately $ 7,005   Watch details Chopard Classic Racing Superfast Chrono Split Second 168542-3001 Chopard Classic Racing Superfast Chrono Split Second 168542-3001 Ref. No. 168542-3001; Automatic; Condition 0 (unworn); New; With Box; With Papers; Location: United States, PA, Southampton; Retail Price::  $16,560.00 Limited to 1000 pieces - The new Classic Racing Superfast... Available immediately $ 9,900   Watch details Bulgari Diagono Scuba Bulgari Diagono Scuba Steel; Automatic; Condition 3 (fair); Location: United States, NY, new york; This Bvlgari Diagono Scuba 38 S GMT Date Stainless Steel Automatic Men's Watch is Pre-owned Box... Available immediately $ 2,799   Watch details Rolex 16570 Explorer II, Steel, F Series Rolex 16570 Explorer II, Steel, F Series Ref. No. 16570; Steel; Automatic; Condition 1 (mint); With Papers; Location: United States, AZ, Scottsdale; Condition: pre-owned, in mint condition. Box and papers: with papers and hang-tags; no... Available immediately $ 4,400   6 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 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 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   15 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 * The Superfast collection... Available immediately $ 18,155   1 Watch details Rolex 18k Rose Gold O/P Semi Bubble Back Vintage Gents 6085 Rolex 18k Rose Gold O/P Semi Bubble Back Vintage Gents 6085 Ref. No. 6085; Pink gold; Manual winding; Condition 2 (fine); Year 1962; With Box; Location: United Kingdom, London; An 18k Rose Gold Semi Bubble Back Vintage Gents Wristwatch, black dial with 18k rose gold applied... Available immediately $ 7,269   2 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   15 Watch details Rolex Datejust II 18K / SS Black Arabic Dial Rolex Datejust II 18K / SS Black Arabic Dial Ref. No. COSC; Automatic; Condition 1 (mint); Year 2013; With Box; With Papers; Location: United States, MA, Boston Available immediately $ 9,250   9 Watch details IWC IW545407 Portuguese Automatic Stainless Steel Mens Watch IWC IW545407 Portuguese Automatic Stainless Steel Mens Watch Steel; Manual winding; Condition 0 (unworn); Year 2011; New; With Box; With Papers; Location: United States, NY, New York; NEW IWC IW545407 Portuguese Automatic Stainless Steel Mens Watch Watch Information Brand,... Available immediately $ 5,450   Watch details Breitling A19030 Montbrilliant 1461 Jours Special Edition, Steel Breitling A19030 Montbrilliant 1461 Jours Special Edition, Steel Ref. No. A19030; Steel; Automatic; Condition 1 (mint); Location: United States, AZ, Scottsdale; Called the "1461 Jours" because it only needs to be corrected every 4 years, for the leap year.... Available immediately $ 4,250   6 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 Ulysse Nardin Marine Chronometer Ulysse Nardin Marine Chronometer Ref. No. 263-33; Steel; Automatic; Condition 1 (mint); With Papers; Location: United States, NY, new york; Brand : Ulysse Nardin Series : Marine Model : Chronometer Model Number : 263-33 Serial... Available immediately $ 4,499   Watch details Omega Aqua Terra Co-Axial Day Date Blue Dial SS / SS Omega Aqua Terra Co-Axial Day Date Blue Dial SS / SS Ref. No. 23110422203001; Steel; Automatic; Condition 1 (mint); With Box; Location: United States, MA, Boston Available immediately $ 4,950   9 Watch details Cartier W202007 Santos 100 Pink Gold Men's Medium Watch Cartier W202007 Santos 100 Pink Gold Men's Medium Watch Ceramic; Automatic; Condition 0 (unworn); Year 2000 to Present; New; With Box; With Papers; Location: United States, NY, New York; New Cartier W202007 Santos 100 Pink Gold Men's Medium Watch Watch Specifications Brand Cartie... Available immediately $ 6,850   Watch details Rolex 18k Y/G Very Rare Wood Dial Day-Date Gents B&P 18038 Rolex 18k Y/G Very Rare Wood Dial Day-Date Gents B&P 18038 Ref. No. 18038; Yellow gold; Automatic; Condition 2 (fine); Year 1999; With Box; With Papers; Location: United Kingdom, London; An 18k Yellow Gold Oyster Perpetual Day-Date Gents Wristwatch, very rare wood dial with applied... Available immediately $ 15,347   2 Watch details Audemars Piguet Royal Oak Offshore Rubens Barrichello III... Audemars Piguet Royal Oak Offshore Rubens Barrichello III... Ref. No. 26284RO.OO.D002CR.01; Red gold; Automatic; Location: United States, NY, New York; NO NEED FOR A FANCY INTRODUCTION FOR THIS BAD BOY...... AUDEMARS PIGUET BARRICHELLO III... Available immediately $ 84,995   17 Watch details Ulysse Nardin Marine Chronometer 1183-122-3/42 Ulysse Nardin Marine Chronometer 1183-122-3/42 Ref. No. 1183-122-3/42; Steel; Automatic; Condition 0 (unworn); New; With Box; With Papers; Location: United States, PA, Southampton; Retail Price::  $10,300.00 The functions of this uniquely masculine Ulysse Nardin Marine... Available immediately $ 7,005   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.