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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Panerai Ferrari Granturismo FER00011 Yellow MINT Complete Panerai Ferrari Granturismo FER00011 Yellow MINT Complete Automatic; Condition 1 (mint); Year 2009; With Box; With Papers; Location: United Kingdom, London; Reference: FER00011. Movement: automatic Panerai OP XII Calibre with 27 jewels, 28,800 vph,... Available immediately $ 4,043   6 Watch details Rolex COSMOGRAPH DAYTONA IN 18CT EVEROSE GOLD CHOCOLATE DIAL Rolex COSMOGRAPH DAYTONA IN 18CT EVEROSE GOLD CHOCOLATE DIAL Ref. No. 116505; Pink gold; Automatic; Condition 1 (mint); Year 2014; With Box; With Papers; Location: United Kingdom, London; ROLEX COSMOGRAPH DAYTONA IN 18CT EVEROSE GOLD CHOCOLATE DIAL List Price £25,100 CARR Price... Available immediately $ 29,156   12 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 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   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 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   6 Watch details 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 $ 43,423   4 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 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
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 Audemars Piguet Ladies Royal Oak Offshore 26092OK Audemars Piguet Ladies Royal Oak Offshore 26092OK Ref. No. 26092OK; Pink gold; Automatic; Condition 1 (mint); Year 2010; With Box; With Papers; Location: Belgium, Antwerpen; Video: Very Good Condition - 2 Year Warranty - Free Worldwide Insured Express Shipping -... Available immediately $ 47,911   7 Watch details Chopard Mille Miglia GT XL Chopard Mille Miglia GT XL Ref. No. 16/8997; Steel; Automatic; Condition 1 (mint); Year 2009; With Box; With Papers; Location: Netherlands, Maastricht; All our watches are delivered with 12 months of warranty. The pictures we take are... Available immediately $ 4,208   34 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 2-YEAR LIMITED WARRANTY* The Omega Seamaster Chrono Coaxial... Available immediately $ 4,950   Watch details Omega Seamaster GMT Omega Seamaster GMT Ref. No. 2534.50.00; Steel; Automatic; Condition 3 (fair); Location: United States, NY, new york; Brand : Omega Series : Seamaster Model : Gmt 50th Anniversary Model Number : 2534.50.00 Movem... Available immediately $ 2,199   Watch details 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   6 Watch details Rolex DAY-DATE 2mal Rolex DAY-DATE 2mal Ref. No. 1803; Yellow gold; Automatic; Condition 1 (mint); Year 1977 / 1985; With Box; With Papers; Location: Germany, Hassloch; Details unter: www.uhren-schoefer.de DAY-DATE Referenz 1803 Plexi mit ROLEX... Available immediately $ 29,783   2 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 Panerai Luminor Submersible 1000 m Taucheruhr Stahl Automatik... Panerai Luminor Submersible 1000 m Taucheruhr Stahl Automatik... Ref. No. PAM00087; Steel; Automatic; Condition 1 (mint); With Box; With Papers; Location: Germany, Stuttgart; Panerai Luminor Submersible 1000m dive watch steel automatic watch limited 44 mm REF. PAM87... Available immediately $ 8,410   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   15 Watch details Breitling Chronomatic / Rose Gold - Limited Edition Breitling Chronomatic / Rose Gold - Limited Edition Ref. No. H41360; Pink gold; Automatic; Condition 1 (mint); Year 2005; With Box; With Papers; Location: Netherlands, 's Hertogenbosch; Breitling Chronomatic Limited Edition NR 197/250 in Rose Gold. The watch is in perfect... Available immediately $ 11,589   Watch details Rolex Oyster Perpetual Midsize Datejust 18K / SS White Roman Rolex Oyster Perpetual Midsize Datejust 18K / SS White Roman Ref. No. COSC; Steel; Automatic; Condition 1 (mint); Year 2002; With Box; Location: United States, MA, Boston Available immediately $ 5,600   9 Watch details Panerai Radiomir Egiziano "Egyptian", Black Dial,... Panerai Radiomir Egiziano "Egyptian", Black Dial,... Ref. No. PAM00341; Titanium; Manual winding; Location: United States, NY, New York; WHOA!!! THE "EGYPTIAN" HAS LANDED!!! A 60mm SPECIMEN, INDEED!!! THIS IS SYLVESTER STALLONE'S... Available immediately price on request   17 Watch details Omega Seamaster Planet Ocean Omega Seamaster Planet Ocean Ref. No. 222.30.38.50.01.001; Steel; Automatic; Condition 0 (unworn); New; With Box; With Papers; Location: United States, NY, new york; Brand : Omega Series : Planet Ocean Model : Seamaster Professional Model Number : 222.30.38.50... Available immediately $ 4,195   Watch details Breitling A4436212 Bentley 6.75 Chronograph, Steel Breitling A4436212 Bentley 6.75 Chronograph, Steel Ref. No. A4436212/G573; Steel; Automatic; Condition 1 (mint); With Box; With Papers; Location: United States, AZ, Scottsdale; Condition: pre-owned, in mint condition. Box and papers: with box, papers and new,... Available immediately $ 6,650   6 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 2-YEAR EXTENDED LIMITED WARRANTY * The Superfast collection... Available immediately $ 18,155   Watch details Omega Seamaster Planet Ocean SS / Orange Rubber 45.5MM Omega Seamaster Planet Ocean SS / Orange Rubber 45.5MM Ref. No. 23232462101001; Steel; Automatic; Condition 1 (mint); With Box; With Papers; Location: United States, MA, Boston Available immediately $ 4,500   9 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 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   15 Watch details 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   6 Watch details Audemars Piguet Royal Oak Offshore Arnold Schwarzenegger... Audemars Piguet Royal Oak Offshore Arnold Schwarzenegger... [Reserved] Ref. No. 26007BA.OO.D088CR.01; Yellow gold; Automatic; Condition 1 (mint); With Box; With Papers; Location: Belgium, Antwerpen; Audemars Piguet Royal Oak Offshore Arnold Schwarzenegger Limited Edition. Only 400 pieces in... Available immediately $ 31,078   7 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.