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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TAG Heuer 18k R/G Brown Dial Ltd Ed Carrera B&P CV5041.FC8164 TAG Heuer 18k R/G Brown Dial Ltd Ed Carrera B&P CV5041.FC8164 Ref. No. CV5041.FC8164; Pink gold; Automatic; Condition 2 (fine); Year 2007; With Box; With Papers; Location: United Kingdom, London; An 18k Rose Gold Limited Edition Carrera Gents Wristwatch, brown textured dial with arabic... Available immediately $ 13,726   since
2007
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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 2-YEAR LIMITED WARRANTY* This Navitimer is very hard to... Available immediately $ 6,250   since
2012
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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   since
2006
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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 $ 11,638   since
2013
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Rolex Skydweller Rose Gold with Bracelet 326935 - Pink... Rolex Skydweller Rose Gold with Bracelet 326935 - Pink... Ref. No. 326935; Pink gold; Automatic; Condition 0 (unworn); Year JULY 2014; With Box; With Papers; Location: United Kingdom, London; Rolex Sky-Dweller The extremely sought after 'Everose' Sky-Dweller on the pink gold bracelet... Available immediately $ 49,579   since
2011
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Omega Planet Ocean 2901.50.81 Omega Planet Ocean 2901.50.81 Ref. No. 2901.50.81; Automatic; Condition 0 (unworn); New; With Box; With Papers; Location: United States, PA, Southampton; Retail Price::  $4,400.00 The 42 mm diver's watch features Omega’s Co-Axial Movement. The... Available immediately $ 3,495   since
2010
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Ulysse Nardin GMT +/- Perpetual Ulysse Nardin GMT +/- Perpetual 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   since
2008
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Rolex Yacht-Master 40mm — Stahl/Gold Perlmutt-Zifferblatt Rolex Yacht-Master 40mm — Stahl/Gold Perlmutt-Zifferblatt Ref. No. 16623; Gold/Steel; Automatic; Condition 1 (mint); Year 2008; With Box; With Papers; Location: Germany, Heilbronn; Trade-in requested!!! · Watches in every price range and in every condition · Jewelry ... Available immediately $ 9,334   since
2011
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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   since
2008
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Audemars Piguet Ladies Royal Oak Offshore 26092OK Audemars Piguet Ladies Royal Oak Offshore 26092OK Ref. No. 26092OK; Pink gold; Automatic; Condition 1 (mint); With Box; With Papers; Location: Belgium, Antwerpen; Retail price: 99.000 USD = 74.000 EUR 100% Original - 100% Intact - 100% Authentic - Fully... Available immediately $ 46,739   since
2012
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Graham Silverstone Stowe SEALED 44 Ref. 2SAAB.B02A Graham Silverstone Stowe SEALED 44 Ref. 2SAAB.B02A Ref. No. 2saab.b02a; Condition 0 (unworn); Year 2014; Location: United States, NY, New York; *COMES WITH SEA WAVE DIAMOND'S 2-YEAR LIMTED WARRANTY* For sale is a BRAND NEW and SEALED... Available immediately $ 4,180   since
2012
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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 2-YEAR LIMITED WARRANTY* The Omega Seamaster Chrono Coaxial... Available immediately $ 4,950   since
2012
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Rolex Submariner Verde Stahl Automatik 40 mm Ref. 16610T LV... Rolex Submariner Verde Stahl Automatik 40 mm Ref. 16610T LV... Ref. No. 16610T LV; Steel; Automatic; Condition 1 (mint); Year 2004; With Box; Location: Germany, Stuttgart; Rolex Submariner Verde Stahl Automatik 40 mm Ref. 16610T LV Vintage Baujahr 2004 - Gehäuse... Available immediately $ 8,006   since
2003
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Rolex Daytona Cosmograph 16528 Diamonds Dial Rolex Daytona Cosmograph 16528 Diamonds Dial Ref. No. 16528; Yellow gold; Automatic; Condition 1 (mint); Year 1992; With Box; With Papers; Location: Italy, Cuneo; Equal AL NEW,complete with everything original kit,inner box, outer box,papers,warranty as... Available immediately $ 26,040   since
2011
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Breitling Superocean Heritage 46mm Breitling Superocean Heritage 46mm Ref. No. A1732016; Steel; Automatic; Condition 1 (mint); Year 2009; With Box; With Papers; Location: Netherlands, 's Hertogenbosch; The Breitling Superocean Heritga in like new complete with orginal box and papers. The watch... Available immediately $ 3,272   since
2012
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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 $ 78,995   since
2008
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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   since
2008
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Audemars Piguet Royal Oak Offshore Team Alinghi Audemars Piguet Royal Oak Offshore Team Alinghi Ref. No. 26062OR.OO.A002CA.01; Pink gold; Automatic; Location: United States, NY, New York; Super Exclusive & Extremely Rare Audemars Piguet Alinghi Team Rose Gold 46mm Royal Oak... Available immediately $ 58,995   since
2008
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Breitling Cockpit Chrono Breitling Cockpit Chrono Ref. No. A13357; Steel; Automatic; Condition 1 (mint); With Box; With Papers; Location: Netherlands, Maastricht; All our watches are delivered with 12 months of warranty. The pictures we take are... Available immediately $ 4,240   since
2005
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Breguet MARINE ROYALE ALARM WHITE GOLD 45mm-EXCLUSIVE Breguet MARINE ROYALE ALARM WHITE GOLD 45mm-EXCLUSIVE Ref. No. 5847BB/92/5ZV; White gold; Automatic; Condition 0 (unworn); With Box; With Papers; Location: United States, NY, New York City; Drop-Dead Gorgeous!!! MARINE ROYALE wristwatch in 18-carat white gold. Self-winding movement... Available immediately $ 37,849   since
2008
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Rolex 116520 Daytona Cosmograph, Steel, Random S/N Rolex 116520 Daytona Cosmograph, Steel, Random S/N Ref. No. 116520; Steel; Automatic; Condition 1 (mint); Location: United States, AZ, Scottsdale; Condition: pre-owned, in mint condition. Box and papers: no box or papers. ... Available immediately $ 10,200   since
2006
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Rolex Submariner Weißgold — LC100 FULL SET Rolex Submariner Weißgold — LC100 FULL SET Ref. No. 116619LB; White gold; Automatic; Condition 1 (mint); Year 12/2012; With Box; With Papers; Location: Germany, Heilbronn; Trade-in requested!!! · Watches in every price range and in every condition · Jewelry ... Available immediately $ 24,304   since
2011
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Rolex Datejust on a Jubilee Bracelet 18ct Yellow Gold Rolex Datejust on a Jubilee Bracelet 18ct Yellow Gold Ref. No. 6516; Yellow gold; Automatic; Condition 2 (fine); Year 1970; Location: Netherlands, Heerlen; EN: Rolex Datejust entirely in 18K yellow gold with an automatic movement. Watch has had a... Available immediately $ 4,661   since
2010
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Breitling Navitimer World GMT Chronograph Breitling Navitimer World GMT Chronograph Ref. No. A24322; Steel; Automatic; Condition 1 (mint); Year 2008; With Box; With Papers; Location: Netherlands, 's Hertogenbosch; The Breitling Navitimer world Chronograph in perfect condition ( Like new ) With box and papers... Available immediately $ 4,607   since
2012
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Rolex Submariner Date Stahl Automatik 40 mm Ref. 16800 Vintage Rolex Submariner Date Stahl Automatik 40 mm Ref. 16800 Vintage Ref. No. 168000; Steel; Automatic; Condition 1 (mint); Year 1986; With Box; Location: Germany, Stuttgart; Rolex Submariner Date steel 40 mm automatic watch REF. 16800 Vintage - Polished stainless steel... Available immediately $ 6,003   since
2003
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Chopard 16/1903-1001 L.U.C. Quattro Mark, White Gold Chopard 16/1903-1001 L.U.C. Quattro Mark, White Gold Ref. No. 16/1903-1001; White gold; Manual winding; Condition 1 (mint); With Box; With Papers; Location: United States, AZ, Scottsdale; Condition: pre-owned, in mint condition. Box and papers: with box and papers. ... Available immediately $ 15,500   since
2006
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Breitling Chronomatic / Chrono-Matic - 18k - NOS - Only 250... Breitling Chronomatic / Chrono-Matic - 18k - NOS - Only 250... Ref. No. H41360; Pink gold; Automatic; Condition 1 (mint); Year 2005; With Box; With Papers; Location: Germany, Karlsruhe; Including Breitling wooden box, carton, chrono-Matic Description warranty certificate from 2005,... Available immediately $ 13,220   since
2014
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Ulysse Nardin GMT Perpetual Rose Gold Limited Edition Ulysse Nardin GMT Perpetual Rose Gold Limited Edition Ref. No. 322-66; Pink gold; Automatic; Condition 1 (mint); With Box; With Papers; Location: Netherlands, Maastricht; LIMITED EDITION OF ONLY 500 PIECES WORLDWIDE!! All our watches are... Available immediately $ 26,574   since
2005
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Audemars Piguet Royal Oak Offshore — Roségold LC100 Audemars Piguet Royal Oak Offshore — Roségold LC100 Ref. No. 25940OK.OO.D002CA.01.A; Pink gold; Automatic; Condition 1 (mint); Year 2004; With Box; With Papers; Location: Germany, Heilbronn; Trade-in requested!!! · Watches in every price range and in every condition · Jewelry ·... Available immediately $ 28,043   since
2011
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IWC Da-Vinci / Platinum / Chronograph / Limited Edition IWC Da-Vinci / Platinum / Chronograph / Limited Edition Ref. No. IW376416; Platinum; Automatic; Condition 1 (mint); With Box; With Papers; Location: United States, NY, New York; *COMES WITH SEA WAVE DIAMONDS 2 YEAR WARRANTY* IWC Da-Vinci / Platinum / Chronograph /... Available in 3-5 working days $ 23,500   since
2012
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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.