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Ulysse Nardin Perpetual Manufacture
TOP
Ulysse Nardin Perpetual Manufacture
S$ 36,901
Seller
LUXE WARE (HK) LIMITED
45
HK
Rolex Texan Beta 21 Vintage 5100
TOP
Rolex Texan Beta 21 Vintage 5100
S$ 143,807
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
170
UK
Hublot King Power F1 India,  Ltd Edition, Box & Papers
TOP
Hublot King Power F1 India, Ltd Edition, Box & Papers
S$ 30,227
Seller
Tempvs Ltd
99
UK
Rolex Day-Date President Pink MOP Roman  Diamond Dial Bezel 18038
TOP
Rolex Day-Date President Pink MOP Roman Diamond Dial Bezel 18038
S$ 20,679
Seller
Watch My Diamonds
109
US
Hublot Big Bang Chronograph 44mm Limited Edition XX/10
TOP
Hublot Big Bang Chronograph 44mm Limited Edition XX/10
S$ 14,293
Seller
Joaillerie Royale
478
BE
Sinn 103 St Sa RB Classic Watch Sondermodell
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
S$ 3,935
Seller
Classic Watch
17
DE
Chopard Mille Miglia Speed Black Power Control
Chopard Mille Miglia Speed Black Power Control
S$ 25,000
Seller
Private Seller
SG
Tudor Heritage Black Bay Automatik Dark 79230DK Lederband
TOP
Tudor Heritage Black Bay Automatik Dark 79230DK Lederband
S$ 4,561
Seller
Uhren2000 GmbH
326
DE
Omega Speedmaster Professional Moonwatch Moonphase Chronograph
Omega Speedmaster Professional Moonwatch Moonphase Chronograph
S$ 10,950
Seller
Prestige Luxury Trading Pte Ltd
SG
Breitling Chronomat 44
TOP
Breitling Chronomat 44
S$ 7,599
Seller
Private Seller
SG
Rolex Datejust
Rolex Datejust
S$ 4,738
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
172
DE
Omega 42mm Seamaster Planet Ocean Chronometer von 2016,...
Omega 42mm Seamaster Planet Ocean Chronometer von 2016,...
S$ 5,605
Free shipping
Seller
chronopark GmbH
 
DE
Rolex Submariner Date sultán dial
Rolex Submariner Date sultán dial
S$ 14,453
Seller
TenerifeWatches
 
ES
Hublot Big Bang Chronograph 44mm Red Devil Bang
TOP
Hublot Big Bang Chronograph 44mm Red Devil Bang
S$ 12,831
Seller
Joaillerie Royale
478
BE
Omega Seamaster Aqua Terra
Omega Seamaster Aqua Terra
S$ 18,362
Seller
Dragon Watch
 
HK
Omega Seamaster Diver 300 M Chronometer Co-Axial Blue Dial
Omega Seamaster Diver 300 M Chronometer Co-Axial Blue Dial
S$ 3,860
Seller
Koosh Jewelers
 
US
Panerai Radiomir Chronograph 42 mm Ref. PAM00369
TOP
Panerai Radiomir Chronograph 42 mm Ref. PAM00369
S$ 9,025
Seller
Uhren2000 GmbH
326
DE
Omega Seamaster Aqua Terra 150M Limited Edition 15007 Gauss Watch
Omega Seamaster Aqua Terra 150M Limited Edition 15007 Gauss Watch
S$ 7,350
Seller
Prestige Luxury Trading Pte Ltd
SG
Omega Constellation
Omega Constellation
S$ 8,685
Seller
Chronostore
 
US
Rolex Submariner Grüne Lünette
Rolex Submariner Grüne Lünette
S$ 16,541
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
172
DE
Omega Speedmaster Apollo 11 Pro von 2005, Limited Edition,...
Omega Speedmaster Apollo 11 Pro von 2005, Limited Edition,...
S$ 14,437
Free shipping
Seller
chronopark GmbH
 
DE
Rolex Yacht-Master 16622  SS/Plat. 40mm
Rolex Yacht-Master 16622 SS/Plat. 40mm
S$ 8,955
Seller
Angel Timepieces Inc.
 
US
Hublot Big Bang 45 MM Unico King Gold Ceramic
Hublot Big Bang 45 MM Unico King Gold Ceramic
S$ 40,951
Seller
MW Sportive GMBH
6
DE
Hamilton Khaki X-Wind
Hamilton Khaki X-Wind
S$ 1,999
Seller
MA Comaposada
 
ES
Omega Seamaster Planet Ocean Chronograph
Omega Seamaster Planet Ocean Chronograph
S$ 5,441
Seller
TenerifeWatches
 
ES
Rolex Submariner Date 40mm
Rolex Submariner Date 40mm
S$ 12,366
Seller
EXPERTYCO
 
PL
Omega Seamaster Planet Ocean Big Blue Ceramic Gmt Watch
Omega Seamaster Planet Ocean Big Blue Ceramic Gmt Watch
S$ 11,000
Seller
Prestige Luxury Trading Pte Ltd
SG
Omega Seamaster
Omega Seamaster
S$ 4,411
Seller
Chronostore
 
US
Omega Seamaster Co Axial Chronometer
Omega Seamaster Co Axial Chronometer
S$ 3,292
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
172
DE
Chopard 44mm Chopard Mille Miglia GTS Chrono Competitor...
Chopard 44mm Chopard Mille Miglia GTS Chrono Competitor...
S$ 7,211
Free shipping
Seller
chronopark GmbH
 
DE
Rolex Yacht-Master 116622 Full Set
Rolex Yacht-Master 116622 Full Set
S$ 13,474
Seller
Henry´s Auktionshaus AG
DE
Panerai PAM01024  Luminor Submersible Automatic Mens 44mm XXX...
Panerai PAM01024 Luminor Submersible Automatic Mens 44mm XXX...
S$ 9,927
Seller
Luxury Discount Store
 
US
Omega CO AXIAL AUTOMATIC CHRONOMETER 4631.31.31
Omega CO AXIAL AUTOMATIC CHRONOMETER 4631.31.31
S$ 7,169
Seller
Swiss Made Corp.
 
US
Breitling Navitimer World
Breitling Navitimer World
S$ 6,263
Seller
SARL Cap City
 
FR
Omega SPEEDMASTER 1957 '50TH ANNIVERSARY
Omega SPEEDMASTER 1957 '50TH ANNIVERSARY
S$ 13,098
Seller
EXPERTYCO
 
PL
Panerai Radiomir Black Seal 45MM Steel Sandwich Dial Watch PAM183
Panerai Radiomir Black Seal 45MM Steel Sandwich Dial Watch PAM183
S$ 6,800
Seller
Prestige Luxury Trading Pte Ltd
SG
Omega Seamaster
Omega Seamaster
S$ 7,582
Seller
Chronostore
 
US
Breitling Colt Chronograph Automatic
Breitling Colt Chronograph Automatic
S$ 5,460
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
172
DE
Breitling Roségold Montbrillant Olympus Chrono Limited...
Breitling Roségold Montbrillant Olympus Chrono Limited...
S$ 14,437
Free shipping
Seller
chronopark GmbH
 
DE
Rolex Medium Pearlmaster 81209 meteorite Diamond dial
Rolex Medium Pearlmaster 81209 meteorite Diamond dial
S$ 30,352
Seller
Henry´s Auktionshaus AG
DE
Omega 232.92.42.21.03.001 Omega Seamaster Planet Ocean...
Omega 232.92.42.21.03.001 Omega Seamaster Planet Ocean...
S$ 10,892
Seller
Luxury Discount Store
 
US
Mühle Glashütte Teutonia II Großdatum M1-33-76-L Limitiert No....
Mühle Glashütte Teutonia II Großdatum M1-33-76-L Limitiert No....
S$ 3,568
Seller
Paul Winnebeck
14
DE
Maurice Lacroix Masterpiece Croneo COSC Roger Federer Special...
Maurice Lacroix Masterpiece Croneo COSC Roger Federer Special...
S$ 5,219
Seller
MA Comaposada
 
ES
Rolex Sea-Dweller Deepsea
Rolex Sea-Dweller Deepsea
S$ 15,993
Seller
EXPERTYCO
 
PL
TAG Heuer Kirium Chronometer Ref. WL5113
TAG Heuer Kirium Chronometer Ref. WL5113
S$ 1,204
Seller
online pfand
7
DE
Breitling Chronomat
Breitling Chronomat
S$ 8,271
Seller
Chronostore
 
US
Breitling Crosswind Blackbird
Breitling Crosswind Blackbird
S$ 7,869
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
172
DE
Omega Ladymatic Co-Axial 34mm Chronometer von 2017, B&P, Ref...
Omega Ladymatic Co-Axial 34mm Chronometer von 2017, B&P, Ref...
S$ 7,789
Free shipping
Seller
chronopark GmbH
 
DE
Rolex Oyster Perpetual Medium Ref. 67488
Rolex Oyster Perpetual Medium Ref. 67488
S$ 13,634
Seller
Henry´s Auktionshaus AG
DE
Omega 32632405006001 Omega Speedmaster Racing Mens Watch...
Omega 32632405006001 Omega Speedmaster Racing Mens Watch...
S$ 5,239
Seller
Luxury Discount Store
 
US
Omega Constellation Chronometer Stainless Steel Watch
Omega Constellation Chronometer Stainless Steel Watch
S$ 2,205
Free shipping
Seller
Avital & Co Jewelry
5
US
Rado Sintra Tennis Chronograph
Rado Sintra Tennis Chronograph
S$ 2,248
Seller
MA Comaposada
 
ES
Rolex GMT-Master II 40mm
Rolex GMT-Master II 40mm
S$ 12,366
Seller
EXPERTYCO
 
PL
Breitling Transocean Unitime Pilot
Breitling Transocean Unitime Pilot
S$ 10,961
Seller
Aaron Faber Gallery
 
US
Breitling Superocean
Breitling Superocean
S$ 4,686
Seller
Chronostore
 
US
Panerai Luminor Submersible 2500 Meter
Panerai Luminor Submersible 2500 Meter
S$ 19,271
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
172
DE
Omega 41,5mm Speedmaster '57 Co-Axial Chronograph, B&P, Ref....
Omega 41,5mm Speedmaster '57 Co-Axial Chronograph, B&P, Ref....
S$ 7,371
Free shipping
Seller
chronopark GmbH
 
DE
Rolex Datejust Medium
Rolex Datejust Medium
S$ 4,802
Seller
Henry´s Auktionshaus AG
DE
Omega 232.30.44.22.01.001 OMEGA SEAMASTER PLANET OCEAN 600 M ...
Omega 232.30.44.22.01.001 OMEGA SEAMASTER PLANET OCEAN 600 M ...
S$ 6,479
Seller
Luxury Discount Store
 
US
Rolex Explorer II
Rolex Explorer II
S$ 7,707
Free shipping
Seller
Rsquared2 - Fine Watches
 
IT
Victorinox Swiss Army AIRBOSS MATCH 6
Victorinox Swiss Army AIRBOSS MATCH 6
S$ 1,943
Seller
MA Comaposada
 
ES
Rolex Submariner No Date 40mm
Rolex Submariner No Date 40mm
S$ 10,920
Seller
EXPERTYCO
 
PL
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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.

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