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TOP
Louis Moinet Mechnograph Steel Blue Limited 12 pieces
S$ 11,385
Verified Dealer
AE
TOP
Eberhard & Co. Tazio Nuvolari 31030-MI Gravè Gold
S$ 18,444
Verified Dealer
 
IT
TOP
Breitling Navitimer 1 B01 Chronograph 43
S$ 8,428
Free shipping
Verified Dealer
203
US
TOP
Tudor Heritage Black Bay Chrono Steel Gold Lederband 79363N-0002
S$ 7,830
Verified Dealer
467
DE
Rolex Submariner ref:114060 full set unpolished
S$ 12,465
Verified Dealer
BE
/spazio21/it/breitling/11808 super avenger iia1337111 c871...
S$ 5,919
Verified Dealer
126
IT
Omega Seamaster Planet Ocean chronograph co axial
S$ 5,276
Verified Dealer
 
SG
Chopard LUC Twist Tech-Ltd. Ed. Singapore 100pcs Sincere Exc
S$ 9,718
Private Seller
 
SG
Omega Seamaster Planet Ocean 600 M Co-Axial Master Chronometer...
S$ 7,119
Verified Dealer
5578
DE
Carl F. Bucherer Patravi Scubatec Steel Cosc 10632.23 /box&papers
S$ 5,152
Verified Dealer
831
PL
Rolex Mint Ladies Rolex DateJust 31 Black Roman 31mm Steel...
S$ 6,100
Free shipping
Verified Dealer
323
US
Rolex Sea-Dweller 4000 43mm in Stainless Steel Ref: 126600
S$ 19,940
Verified Dealer
15
SG
Ball Engineer Hydrocarbon DeepQUEST
S$ 4,573
Verified Dealer
39
NL
Omega Seamaster Aqua Terra Co-Axial Chronograph
S$ 4,000
Verified Dealer
130
SG
TOP
Rolex Lady-Datejust Pearlmaster 29, closing sale, o.p. 78.400 CHF
S$ 66,961
Verified Dealer
29
CH
Breitling Navitimer Top Gun
S$ 5,954
Verified Dealer
 
SG
Concord Impresario Chronograph
S$ 2,800
Private Seller
 
SG
Breitling Superocean Heritage II B20 Automatic 44
S$ 6,385
Verified Dealer
5578
DE
Omega Speedmaster Reduced
S$ 4,400
Private Seller
 
SG
Rolex Lady-Datejust
S$ 5,200
Private Seller
 
SG
IWC Pilot Chronograph
S$ 5,552
Private Seller
 
SG
Graham Chronofighter "Stuffy" Limited Edition Ref: 2CFBPS
S$ 3,310
Verified Dealer
15
SG
Breitling Crosswind Special
Price on request
Verified Dealer
US
Breitling Montbrillant
S$ 4,799
Private Seller
 
SG
TOP
Rolex Lady-Datejust, new, closing sale - official price 32.000...
S$ 27,900
Verified Dealer
29
CH
Breitling Navitimer 8
S$ 6,118
Private Seller
 
SK
Omega Seamaster Planet Ocean 600 M Co-Axial Master Chronometer...
S$ 7,119
Verified Dealer
5578
DE
Omega Seamaster Aqua Terra
S$ 4,500
Private Seller
 
SG
TOP
Zenith Grande Class Grande Date Rattrapante, Split Second,...
S$ 18,484
Verified Dealer
15
CH
Ball Engineer Hydrocarbon
S$ 3,150
Verified Dealer
25
SG
Omega Seamaster Aqua Terra XXL in 18k Orange Gold Ref:...
S$ 14,700
Verified Dealer
15
SG
Girard Perregaux laureato EVO3
S$ 12,082
Private Seller
 
DE
Omega De Ville Ladymatic
S$ 7,359
Private Seller
 
SG
TOP
Hublot Classic Fusion Ultra-Thin 45, closing sale - o.p....
S$ 10,461
Verified Dealer
29
CH
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
S$ 3,747
Verified Dealer
67
DE
Omega Seamaster Planet Ocean 600 M Co-Axial Master Chronometer...
S$ 7,119
Verified Dealer
5578
DE
Omega Seamaster Planet Ocean 600M Co-Axial Master Chronometer...
S$ 8,452
Free shipping
Verified Dealer
781
SG
Rolex Sea-Dweller
S$ 20,280
Verified Dealer
 
SG
Breitling Avenger Blackbird 48
S$ 4,158
Private Seller
 
US
Omega Seamaster Aqua Terra 150M Co-Axial Ref: 23110392102001
S$ 3,730
Verified Dealer
15
SG
Ball Engineer Hydrocarbon Nedu
S$ 4,095
Verified Dealer
25
SG
TOP
Casio Gravitymaster GWR-B1000X-1AER LIm-Edition
S$ 1,415
Verified Dealer
119
ES
TOP
Rolex Datejust 36, new, closing sale - official price 28.400 CHF
S$ 25,109
Verified Dealer
29
CH
Breitling Superocean Héritage II 42
S$ 5,276
Verified Dealer
32
DE
Omega De Ville Prestige Co-Axial 32,7mm
S$ 4,596
Verified Dealer
5578
DE
Panerai Luminor Power Reserve PAM27
S$ 9,850
Verified Dealer
 
SG
Ball Engineer Hydrocarbon Spacemaster
S$ 2,150
Verified Dealer
SG
Rolex Cosmograph Daytona Black Dial Stainless Steel Ref. 116520
Price on request
Verified Dealer
6
US
Omega Seamaster Planet Ocean Chronograph
S$ 5,460
Verified Dealer
15
SG
Ball Engineer Hydrocarbon AeroGMT II
S$ 3,780
Verified Dealer
25
SG
Rolex Submariner (No Date) Ref. 114060
S$ 15,584
Free shipping
Verified Dealer
 
DE
TOP
Rolex Lady-Datejust Pearlmaster 29, closing sale, o.p. 31000 CHF
S$ 25,807
Verified Dealer
29
CH
Breitling Navitimer 8
S$ 5,582
Verified Dealer
32
DE
Rolex Daytona 116500LN
S$ 39,117
Free shipping
Verified Dealer
441
UK
Panerai Special Editions
S$ 18,250
Verified Dealer
 
SG
Omega Seamaster 300M Chronometer
S$ 3,150
Verified Dealer
SG
Rolex Submariner Stainless Steel Ref. 5512 Black Matte 4-Line...
Price on request
Verified Dealer
6
US
Rolex Lady-Datejust
S$ 19,940
Verified Dealer
15
SG
Ball DG2018C-SCJ-BK
S$ 3,150
Verified Dealer
25
SG
Rolex Submariner Date Ref. 116613LB
S$ 19,347
Free shipping
Verified Dealer
 
DE
TOP
Rolex Datejust Pearlmaster 34, new, closing sale - o.p. 31.600...
S$ 27,202
Verified Dealer
29
CH
Breitling Navitimer 8
S$ 8,182
Verified Dealer
32
DE
Rolex Ladies Datejust Silver Diamond, Bezel & Lugs 18k Yellow...
S$ 4,853
Free shipping
Verified Dealer
 
US
TAG Heuer WAR5010.BA0723 Steel Carrera
S$ 3,985
Verified Dealer
7
US
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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.