Chronometer


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Omega Chronometer Deville Prestige Chronometer Automatic... Omega Chronometer Deville Prestige Chronometer Automatic... Automatic; Condition 1 (mint); Year 2000s; Location: United States, CA, LOS ANGELESAvailable immediately Payment & processing through Chrono24 $1,989 Trusted Checkouts: 26   Watch details Rolex Day Date President 18K Yellow Gold / Diamond Dial Rolex Day Date President 18K Yellow Gold / Diamond Dial Ref. No. COSC; Yellow gold; Automatic; Condition 1 (mint); Year 1995; With box; Location: United States, MA, BostonAvailable immediately Payment & processing through Chrono24 $14,500   9 Watch details
Ulysse Nardin Maxi Marine Diver Early Version Yellow Gold... Ulysse Nardin Maxi Marine Diver Early Version Yellow Gold... Ref. No. 266-51; Yellow gold; Automatic; Condition 1 (mint); With box; With papers; Location: United States, FL, North Miami BeachAvailable immediately Payment & processing through Chrono24 $11,330 Trusted Checkouts: 6   Watch details Breitling Chronomat 44 Airborne Chronograph - Ref. AB01154G/BD... Breitling Chronomat 44 Airborne Chronograph - Ref. AB01154G/BD... Ref. No. AB01154G/BD13; Steel; Automatic; Condition 1 (mint); Year 2015; With box; With papers; Location: United States, FL, HollywoodAvailable immediately Payment & processing through Chrono24 $4,995 Trusted Checkouts: 10   2 Watch details Ulysse Nardin Sonata Silicium Cathedra 670-85 Ulysse Nardin Sonata Silicium Cathedra 670-85 Ref. No. 670-85; White gold; Automatic; Condition 3 (fair); Year 2010; With box; With papers; Location: United States, CA, Beverly HillsAvailable immediately Payment & processing through Chrono24 $29,500   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 YorkAvailable immediately Payment & processing through Chrono24 $6,250 Trusted Checkouts: 7   1 Watch details Glashütte Original Senator Chromometer Regulator 58-04-04-05-04 Glashütte Original Senator Chromometer Regulator 58-04-04-05-04 Ref. No. 58-04-04-05-04; Pink gold; Manual winding; Condition 1 (mint); With box; With papers; Location: United States, PA, PhiladelphiaAvailable immediately Payment & processing through Chrono24 $21,500 Trusted Checkouts: 20   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, SouthamptonAvailable immediately Payment & processing through Chrono24 $3,589   3 Watch details Rolex 16570 Explorer II, Steel, White Dial Rolex 16570 Explorer II, Steel, White Dial Ref. No. 16570; Steel; Automatic; Condition 1 (mint); Location: United States, AZ, ScottsdaleAvailable immediately $3,750   5 Watch details
Omega Constellation Co-axial Chronometer Automatic, C2010 (1003) Omega Constellation Co-axial Chronometer Automatic, C2010 (1003) Steel; Automatic; Condition 1 (mint); Year 2010; Location: United States, CA, LOS ANGELESAvailable immediately Payment & processing through Chrono24 $3,139 Trusted Checkouts: 26   Watch details Breitling Colt GMT Silver Dial SS / SS Breitling Colt GMT Silver Dial SS / SS Ref. No. COSC; Steel; Automatic; Condition 1 (mint); With box; With papers; Location: United States, MA, BostonAvailable immediately Payment & processing through Chrono24 $1,700   9 Watch details Ulysse Nardin Maxi Marine Diver Titanium Black Rubber Men'... Ulysse Nardin Maxi Marine Diver Titanium Black Rubber Men'... Ref. No. 263-90-3/72; Titanium; Automatic; Condition 1 (mint); With box; With papers; Location: United States, FL, North Miami BeachAvailable immediately Payment & processing through Chrono24 $6,600 Trusted Checkouts: 6   Watch details Breitling SuperOcean Heritage Chronograph - Ref. A2337024/BB81... Breitling SuperOcean Heritage Chronograph - Ref. A2337024/BB81... Ref. No. A2337024/BB81-154A; Steel; Automatic; Condition 1 (mint); Year 2015; With box; With papers; Location: United States, FL, HollywoodAvailable immediately Payment & processing through Chrono24 $3,695 Trusted Checkouts: 10   2 Watch details Omega Seamaster Professional Automatic, Bond Edition, Full Size Omega Seamaster Professional Automatic, Bond Edition, Full Size Ref. No. 2531.80.00; Steel; Automatic; Condition 1 (mint); With box; With papers; Location: United States, CAAvailable immediately $1,650   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 YorkAvailable immediately Payment & processing through Chrono24 $17,500 Trusted Checkouts: 7   1 Watch details Panerai Luminor Marina : PAM 48 Panerai Luminor Marina : PAM 48 Ref. No. PAM 48; Steel; Automatic; Condition 1 (mint); With box; With papers; Location: United States, TX, AustinAvailable immediately Payment & processing through Chrono24 $4,895   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, SouthamptonAvailable immediately Payment & processing through Chrono24 $32,000   3 Watch details Rolex 16610 Submariner, Steel with black PVD, W Series Rolex 16610 Submariner, Steel with black PVD, W Series Ref. No. 16610; Steel; Automatic; Condition 1 (mint); Location: United States, AZ, ScottsdaleAvailable immediately $6,200   5 Watch details Omega Constellation Automatic C.1960s Tapestry Dial #6526 Omega Constellation Automatic C.1960s Tapestry Dial #6526 Steel; Automatic; Condition 1 (mint); Location: United States, CA, LOS ANGELESAvailable immediately Payment & processing through Chrono24 $1,099 Trusted Checkouts: 26   Watch details Rolex Submariner No Date SS Rolex Submariner No Date SS Ref. No. 14060M; Steel; Automatic; Condition 1 (mint); Year 1996; Location: United States, MA, BostonAvailable immediately Payment & processing through Chrono24 $5,800   9 Watch details Ulysse Nardin Marine Chronometer Manufacture Stainless Steel... Ulysse Nardin Marine Chronometer Manufacture Stainless Steel... Ref. No. 1183-126-7M/63; Steel; Automatic; Condition 1 (mint); With box; With papers; Location: United States, FL, North Miami BeachAvailable immediately Payment & processing through Chrono24 $8,250 Trusted Checkouts: 6   Watch details Panerai Luminor Base 8 Days Acciaio PAM 560 R-Series -... Panerai Luminor Base 8 Days Acciaio PAM 560 R-Series -... Ref. No. PAM00560; Steel; Manual winding; Condition 1 (mint); Year 2015; With box; With papers; Location: United States, FL, HollywoodAvailable immediately Payment & processing through Chrono24 $5,595 Trusted Checkouts: 10   2 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 YorkAvailable immediately Payment & processing through Chrono24 $15,700 Trusted Checkouts: 16   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); With box; With papers; Location: United States, NY, New YorkAvailable in 3-5 working days Payment & processing through Chrono24 $4,990 Trusted Checkouts: 7   1 Watch details Omega Seamaster Planet Ocean Omega Seamaster Planet Ocean Ref. No. 2201.50; Steel; Automatic; Condition 1 (mint); Year 2007; Location: United States, NY, White PlainsAvailable immediately Payment & processing through Chrono24 $2,799 Trusted Checkouts: 13   Watch details Omega Aqua Terra 150 M Omega C0-Axial 231.18.39.21.51.001 Omega Aqua Terra 150 M Omega C0-Axial 231.18.39.21.51.001 Ref. No. 231.18.39.21.51.001; Steel; Automatic; Condition 0 (unworn); With box; With papers; Location: United States, PA, SouthamptonAvailable immediately Payment & processing through Chrono24 $8,500   3 Watch details Rolex 16570 Explorer II, Steel, with black PVD Coating Rolex 16570 Explorer II, Steel, with black PVD Coating Ref. No. 16570; U Series; Steel; Automatic; Condition 1 (mint); Location: United States, AZ, ScottsdaleAvailable immediately $6,100   5 Watch details Panerai PAM 36 Marina Militare Tobacco Dial Titanium 44 mm... Panerai PAM 36 Marina Militare Tobacco Dial Titanium 44 mm... Ref. No. PAM 36; Titanium; Manual winding; Condition 1 (mint); With box; With papers; Location: United States, MO, Maryland HeightsAvailable immediately Payment & processing through Chrono24 $29,980   Watch details Rolex Vintage RED Submariner MK VI 1973 Rolex Vintage RED Submariner MK VI 1973 Ref. No. COSC; Automatic; Condition 1 (mint); Year 1973; Location: United States, MA, BostonAvailable immediately Payment & processing through Chrono24 $14,500   9 Watch details Ulysse Nardin Perpetual Manufacture Platinum Black Men`s Watch Ulysse Nardin Perpetual Manufacture Platinum Black Men`s Watch Ref. No. 329-10/92; Platinum; Automatic; Condition 0 (unworn); Location: United States, FL, North Miami BeachAvailable immediately Payment & processing through Chrono24 $48,650 Trusted Checkouts: 6   Watch details
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Chronometer - Certified Precision

"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".

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.