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TOP
Breitling Crosswind Racing 18K/SS Special Mother of Pearl Dial
S$ 6,578
Free shipping
Verified Dealer
179
US
TOP
Ulysse Nardin Marine Chronometer Manufacture
S$ 6,865
Verified Dealer
AE
TOP
Omega 123.10.38.21.06.001 CONSTELLATION
S$ 5,280
Verified Dealer
10
HK
TOP
Omega 424.58.40.20.52.001 DE VILLE
S$ 18,611
Verified Dealer
10
HK
TOP
Rolex Datejust Pearlmaster 39, official price 112.000 CHF
S$ 102,776
Verified Dealer
28
CH
Rolex 116515LN Cosmograph Daytona Ceramic 18K Everose Gold /...
S$ 44,133
Verified Dealer
344
US
Breitling Navitimer 1 Chronograph 41
S$ 8,943
Verified Dealer
5415
DE
Ball Engineer Hydrocarbon
S$ 3,150
Verified Dealer
 
SG
Omega Seamaster Aqua Terra 150 co-axial silver dial leather
S$ 5,962
Verified Dealer
746
BE
Rolex Datejust Ii White Dial Domed Bezel Steel Mens Watch 116300
S$ 9,513
Free shipping
Verified Dealer
259
US
TAG Heuer Grand Carrera Calibre 8
S$ 5,806
Verified Dealer
2252
DE
Chopard LUC Twist Tech-Ltd. Ed. Singapore 100pcs Sincere Exc
S$ 9,806
Private Seller
 
SG
Rolex Datejust 41 126333 2016 Lc 100 Stahl Gelbgold 750...
S$ 15,160
Verified Dealer
481
DE
TOP
Breguet Marine 35, official price 19.000 CHF
S$ 18,301
Verified Dealer
28
CH
Omega Seamaster Planet Ocean
S$ 3,950
Verified Dealer
109
SG
Breitling Navitimer 1 Automatic 38
S$ 4,824
Verified Dealer
5415
DE
Ball Engineer Hydrocarbon Nedu
S$ 4,060
Verified Dealer
 
SG
Omega Seamaster Planet Ocean 600M 37.5 Co-Axial Steel Diamond...
S$ 12,373
Verified Dealer
746
BE
Omega Seamaster Planet Ocean Co-Axial Master Chronometer GMT
S$ 16,570
Verified Dealer
 
BE
Hamilton Khaki Aviation Khaki X Wind Day Date Auto Chrono
S$ 2,863
Verified Dealer
2252
DE
Baume & Mercier 65413 Capeland, COSC cert. Chrono, Titanium /...
S$ 2,801
Private Seller
 
SG
TOP
Chopard L.U.C Pro One Diver black dial 42,5 - TOP CONDITION
S$ 5,033
Free shipping
Verified Dealer
448
NL
TOP
Rolex Lady-Datejust Pearlmaster 29, official price 78.400 CHF
S$ 71,802
Verified Dealer
28
CH
Chopard Superfast Classic Racing Ref: 8523
S$ 5,670
Verified Dealer
7
SG
TOP
Chopard Manufacture Caliber Mille Miglia 01.01-C GT XL 8565
S$ 4,638
Verified Dealer
368
ES
Ball DG2018C-S5C-BK
S$ 3,150
Verified Dealer
 
SG
Omega De Ville Hour Vision 41mm Black Dial Steel NEW
S$ 7,975
Verified Dealer
746
BE
Omega Constellation Globemaster Co-Axial
S$ 12,389
Verified Dealer
 
BE
Omega Constellation Omega Co-Axial 27 mm
S$ 9,476
Verified Dealer
2252
DE
Omega Seamaster Aqua Terra
S$ 4,825
Private Seller
 
SG
Rolex Day Date 18ct
S$ 29,664
Verified Dealer
370
UK
TOP
Breguet Classique 40, official price 18.300 CHF
S$ 17,598
Verified Dealer
28
CH
Graham Chronofighter "Stuffy" Limited Edition Ref: 2CFBPS
S$ 3,310
Verified Dealer
7
SG
TOP
Breitling CHRONOMAT 44 GMT AUTOMATIC AB042011 unworn 4750ht
S$ 8,347
Free shipping
Verified Dealer
132
FR
Ball DG2018C-SCJ-BK
S$ 3,150
Verified Dealer
 
SG
Omega Seamaster Aqua Terra 150M Co-Axial 38.5mm Pink Gold...
S$ 7,975
Verified Dealer
746
BE
Breitling Navitimer 8 Automatic 41
S$ 4,847
Verified Dealer
119
DE
Omega De Ville Prestige Co-Axial 32,7 mm
S$ 6,828
Verified Dealer
2252
DE
Breitling Navitimer Montbrillant
S$ 4,799
Private Seller
 
SG
Rolex Datejust II
S$ 14,304
Verified Dealer
370
UK
TOP
Rolex Lady-Datejust Pearlmaster 29, official price 31.000 CHF
S$ 29,565
Verified Dealer
28
CH
Breitling Navitimer World Ref: A24322
S$ 4,610
Verified Dealer
7
SG
TOP
Hublot Big Bang Carbon Bezel Baguette 23650€ HT
S$ 41,656
Free shipping
Verified Dealer
132
FR
Omega Seamaster Planet Ocean 600M Co-Axial Master Chronometer...
S$ 8,933
Free shipping
Verified Dealer
557
SG
Omega Seamaster Diver 300m blue dial steel chronograph...
S$ 6,334
Verified Dealer
746
BE
Ball Engineer Hydrocarbon Spacemaster
S$ 2,150
Verified Dealer
SG
Ulysse Nardin Marine Chronometer
S$ 10,993
Verified Dealer
2252
DE
Breitling Montbrillant
S$ 4,799
Private Seller
 
SG
Rolex Sky Dweller 45mm VS Diamond Watch 26.5 Ct
S$ 88,265
Verified Dealer
25
US
TOP
Rolex Lady-Datejust, official price 32.000 CHF
S$ 27,453
Verified Dealer
28
CH
Omega Seamaster Planet Ocean Chronograph
S$ 5,460
Verified Dealer
7
SG
TOP
Breitling NAVITIMER 01 ROSEGOLD RB012012 unworn 12230HT
S$ 21,525
Free shipping
Verified Dealer
132
FR
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
S$ 3,794
Verified Dealer
62
DE
Auction
Rolex | Ref 116520 Daytona, A Stainless Steel Automatic...
S$ 16,812
Estimated price
Sotheby´s
 
Breitling Montbrillant Légende
S$ 5,950
Verified Dealer
SG
Breitling Superocean Heritage II B01 Chronograph 44
S$ 9,166
Verified Dealer
2252
DE
Breitling Aerospace EVO Like New Full Set 2018
S$ 3,361
Private Seller
 
SG
Breitling Navitimer Top Gun
S$ 6,008
Verified Dealer
 
SG
TOP
Hublot Classic Fusion Ultra-Thin 45, official price 11.900 CHF
S$ 11,262
Verified Dealer
28
CH
Rolex Lady-Datejust
S$ 19,940
Verified Dealer
7
SG
Panerai Luminor Power Reserve PAM27
S$ 9,850
Verified Dealer
 
SG
Zenith El Primero Chronomaster El Primero Open Auto Chrono 42MM
S$ 8,950
Verified Dealer
SG
Omega Speedmaster Reduced
S$ 4,400
Private Seller
 
SG
Ball Engineer II Magneto S
S$ 3,500
Private Seller
 
SG
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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.