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TOP
Patek Philippe Very rare antique 1875 Split Chronograf
S$ 19,423
Seller
EVW EDYTA KAISER
31
PL
TOP
A. Lange & Söhne Taschenuhr A. Lange & Söhne Gold savonnette...
S$ 15,974
Free shipping
Seller
Antiquitäten carsten berger
9
DE
TOP
Ball Engineer Hydrocarbon AeroGMT II 42mm
S$ 5,050
Seller
Vaessen Juweliers
22
NL
TOP
Breitling Emergency K56121.1 Yellow Gold - Box & Papers 2004
S$ 28,603
Seller
Mark Worthington Jewellers
202
UK
TOP
Rolex Lady-Datejust
S$ 21,733
Seller
Chronometrie Stäuble AG
18
CH
TAG Heuer 6000 Series Chronometer Full Set
S$ 14,330
Seller
Lu-Ann Vintage Collection
5
SG
TOP
Rolex OYSTER PERPETUAL CHRONOMETER 18K GOLD HONEYCOMB WABENBLATT
S$ 12,415
Seller
Timeless Watches GmbH
352
DE
Rolex GMT-Master 16750 transitional model
S$ 18,888
Seller
Private Seller
 
SG
Breitling Navitimer Top Gun
S$ 5,937
Seller
Mo Li Hua Watches and Jewelry
 
SG
TOP
Sinn 910 SRS Flyback Chronograph
S$ 5,749
Free shipping
Seller
Istock LTD
218
LV
Breitling Transocean Chronograph FULL SET
S$ 3,950
Seller
ETI International Consulting
71
SG
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
S$ 3,807
Seller
Classic Watch
56
DE
TOP
Omega De Ville Hour Vision 18K Redgold NEW
S$ 15,679
Seller
Timeless Watches & Jewellery AG
608
LI
TOP
Breguet Marine
S$ 16,822
Seller
Chronometrie Stäuble AG
18
CH
TAG Heuer Monza Chronograph 18K Gold Limited Edition Automatic
S$ 9,692
Seller
Lu-Ann Vintage Collection
5
SG
TOP
Rolex Lady Datejust 18K Gold Weissgold Automatic Automatik
S$ 10,862
Seller
Timeless Watches GmbH
352
DE
Rolex Daytona 16520 A serial
S$ 33,888
Seller
Private Seller
 
SG
Omega Seamaster Planet Ocean chronograph co axial
S$ 5,261
Seller
Mo Li Hua Watches and Jewelry
 
SG
TOP
Sinn Diving Watch U1 B
S$ 2,828
Seller
Istock LTD
218
LV
Ball Engineer Hydrocarbon Nedu
S$ 3,800
Seller
ETI International Consulting
71
SG
TOP
Casio GMW-B5000GD-9 G-SHOCK
S$ 853
Seller
First Advanced Watches
100
ES
Panerai Luminor Power Reserve PAM27
S$ 9,850
Seller
Monster Time Gallery
 
SG
TOP
Rolex Datejust 36
S$ 28,054
Seller
Chronometrie Stäuble AG
18
CH
Omega Speedmaster Broad Arrow Chronograph
S$ 5,864
Seller
Lu-Ann Vintage Collection
5
SG
Omega Seamaster Planet Ocean 600M Co-Axial Master Chronometer...
S$ 8,041
Free shipping
Seller
ZW Watches
426
SG
Ulysse Nardin Marine Chronometer Manufacture 45mm 18kt Rose...
S$ 10,522
Seller
Private Seller
 
SG
TOP
Breitling Edition Special Limited A 25 Exemplaires - G34360
S$ 155,387
Free shipping
Seller
Pawndeluxe
400
NL
TOP
Omega Seamaster Planet Ocean Master 43,5 PyeongChang 2018 Limited
S$ 8,484
Seller
Uhren2000 GmbH
427
DE
TOP
Eberhard & Co. Chrono 120 ÉME Aniversario Edicion Limitada
S$ 13,519
Seller
CANTELI JOYEROS SL
41
ES
Breitling Montbrillant Légende
S$ 5,950
Seller
Asia Timepiece Centre
SG
Panerai Special Editions
S$ 17,888
Seller
Monster Time Gallery
 
SG
TOP
Rolex Cellini Prince, new, official retail price 16.800 CHF
S$ 14,016
Seller
Chronometrie Stäuble AG
18
CH
TAG Heuer Monza Chronograph Calibre 36
S$ 5,746
Seller
Lu-Ann Vintage Collection
5
SG
TAG Heuer Grand Carrera
S$ 5,656
Seller
OROLOGERIA ZANONI
10
IT
Breitling Transocean Unitime Pilot
S$ 7,500
Seller
Private Seller
 
SG
TOP
Chopard Superfast Mille Miglia GT XL Chronograph Classic Racing
S$ 5,827
Free shipping
Seller
Pawndeluxe
400
NL
Omega Seamaster Planet Ocean Deep Black GMT 215.92.46.22.01.002
S$ 11,000
Seller
Prestige Luxury Trading Pte Ltd
SG
Breitling Bentley Flying B
S$ 10,722
Seller
Helmut Seidl GmbH
13
DE
Breitling Chronomat 44 Airborne
S$ 5,668
Seller
Asia Timepiece Centre
SG
Rolex DAY-DATE Platinum | 118366 | Baguette Bezel | Full Set |
S$ 90,124
Seller
nobeluhren-store.de
23
DE
TOP
Rolex Lady-Datejust
S$ 7,359
Seller
Chronometrie Stäuble AG
18
CH
Chopard Tycoon XL Two O Ten Chronograph
S$ 4,431
Seller
Lu-Ann Vintage Collection
5
SG
Rolex Submariner Date Reference 16610 T
S$ 12,321
Seller
Guarded Crown
18
US
Omega Seamaster Railmaster 1957 Trilogy Co-Axial Master...
S$ 6,900
Seller
Private Seller
 
SG
TOP
Ulysse Nardin 41 Maxi Marine Chronometer Power Reserve Display...
S$ 5,439
Free shipping
Seller
Pawndeluxe
400
NL
Zenith El Primero Chronomaster El Primero Open Auto Chrono 42MM
S$ 8,950
Seller
Prestige Luxury Trading Pte Ltd
SG
Breitling Bentley Flying B
S$ 10,722
Seller
Helmut Seidl GmbH
13
DE
Omega Seamaster 300M Chronometer
S$ 3,150
Seller
Asia Timepiece Centre
SG
Rolex 16520 A-Serie Zenith DAYTONA 1999 Full Set
S$ 45,062
Seller
nobeluhren-store.de
23
DE
TOP
Rolex Lady-Datejust
S$ 7,008
Seller
Chronometrie Stäuble AG
18
CH
Omega Seamaster Diver 300 M Full Set
S$ 5,982
Seller
LUXUS-PORT
127
DE
Chopard 161926-5001 L.U.C Quattro - 9 Day Power Reserve
S$ 25,393
Free shipping
Seller
Watch Club
89
UK
Breitling Navitimer Montbrillant
S$ 4,799
Seller
Private Seller
 
SG
TOP
Breitling Bentley GT Continental Racing - A13363
S$ 5,439
Free shipping
Seller
Pawndeluxe
400
NL
Tudor Black Bay Chrono 79350
S$ 4,811
Seller
Guarded Crown
18
US
Breitling Chronomat Evolution
S$ 6,992
Seller
Helmut Seidl GmbH
13
DE
Ball Engineer Hydrocarbon Spacemaster
S$ 2,150
Seller
Asia Timepiece Centre
SG
Rolex DAYTONA | 116506 | Platin Ice Blue | Full Set 2015 | LC100
S$ 94,786
Seller
nobeluhren-store.de
23
DE
TOP
Tiffany Atlas 42, new, official retail price 7.130 CHF
S$ 4,909
Seller
Chronometrie Stäuble AG
18
CH
Omega Seamaster Diver 300 M 2014 Like NEW, Full SET
S$ 4,662
Seller
LUXUS-PORT
127
DE
Breitling Montbrillant
S$ 4,799
Seller
Private Seller
 
SG
Ball Engineer II Magneto S
S$ 3,500
Seller
Private Seller
 
SG
Ebel 1911 Discovery
S$ 3,000
Seller
Private Seller
 
SG
Zenith 03.0510.4002
S$ 2,500
Seller
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.