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Rolex GMT-Master II 116758SARU
TOP
Rolex GMT-Master II 116758SARU
RM257,929
Seller
MMC RIVIERA
5
MC
Tudor Heritage Black Bay Automatik Bronze 79250BM Leder
TOP
Tudor Heritage Black Bay Automatik Bronze 79250BM Leder
RM15,334
Seller
Uhren2000 GmbH
311
DE
Rolex Sea-Dweller Deepsea
Rolex Sea-Dweller Deepsea
RM54,853
Seller
Private Seller
MY
Rolex Sea-Dweller Oyster Perpetual 43mm
TOP
Rolex Sea-Dweller Oyster Perpetual 43mm
RM56,787
Free shipping
Seller
Plus Watch - Luxury Watches
2562
IT
Sinn 103 St Sa RB Classic Watch Sondermodell
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
RM11,595
Seller
Classic Watch
16
DE
Rolex Sea Dweller Ref. 1665
TOP
Rolex Sea Dweller Ref. 1665
Price on request
Seller
Meertz WORLDOFTIME.DE
37
DE
Hublot Big Bang Carbon Bezel Baguette 24000€ HT
TOP
Hublot Big Bang Carbon Bezel Baguette 24000€ HT
RM136,300
Seller
RIVIERAWATCH
77
FR
Omega Speedmaster Moonphase Chronograph Co-Axial Automatic
Omega Speedmaster Moonphase Chronograph Co-Axial Automatic
RM25,426
Seller
collector's time gallery
MY
Breitling Navitimer World GMT 46 Chronograph Chronometer
Breitling Navitimer World GMT 46 Chronograph Chronometer
RM16,067
Seller
Westend-Juwelier
 
DE
Rolex Submariner - HULK - 116610LV
Rolex Submariner - HULK - 116610LV
RM44,444
Seller
Hoboken Watch
 
US
Rolex Oyster Perpetual Date
Rolex Oyster Perpetual Date
RM15,144
Free shipping
Seller
Ronaldowatch
10
NL
Breitling Avenger II GMT
Breitling Avenger II GMT
RM11,595
Seller
Chronorelojes, S.L.
9
ES
Tudor Black Bay 79230N Heritage Nero Black Disc T
TOP
Tudor Black Bay 79230N Heritage Nero Black Disc T
RM12,773
Free shipping
Seller
Plus Watch - Luxury Watches
2562
IT
Breitling Navitimer 01 Limited Edition
Breitling Navitimer 01 Limited Edition
RM24,214
Seller
Timespec
 
UK
Breitling Superocean Heritage 46
Breitling Superocean Heritage 46
RM13,251
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
153
DE
Rolex Sea-Dweller [11/2017]
Rolex Sea-Dweller [11/2017]
RM56,000
Seller
Swiss Connection Watches Pte Ltd
MY
Breitling Chronomat 44 Chronograph (Mint)
Breitling Chronomat 44 Chronograph (Mint)
RM19,201
Seller
collector's time gallery
MY
Breitling for Bentley GT Racing (inkl. 19%MwSt)
Breitling for Bentley GT Racing (inkl. 19%MwSt)
RM25,083
Seller
Chronolux24.de
 
DE
Omega Planet Ocean Blue 600M
Omega Planet Ocean Blue 600M
RM18,978
Seller
Hoboken Watch
 
US
Rolex Sea-Dweller
Rolex Sea-Dweller
RM30,402
Seller
A. W. Porter & Son Ltd
 
UK
Omega Ploprof, weisses Zifferblatt, Referenz: 224.32.55.21.0
Omega Ploprof, weisses Zifferblatt, Referenz: 224.32.55.21.0
RM25,320
Seller
Firma Boris Pjanic
 
DE
Rolex Daytona Cosmograph Oysterflex 40MM Gold
TOP
Rolex Daytona Cosmograph Oysterflex 40MM Gold
RM112,869
Free shipping
Seller
Plus Watch - Luxury Watches
2562
IT
Vacheron Constantin Overseas
Vacheron Constantin Overseas
RM42,443
Free shipping
Seller
Swiss Ice
 
US
Rolex Submariner
Rolex Submariner
RM47,326
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
153
DE
Omega De Ville Hour Vision
Omega De Ville Hour Vision
RM22,869
Seller
its time for watch
7
UK
Omega Speedmaster Moon Watch
Omega Speedmaster Moon Watch
RM14,435
Seller
Gioielleria Negrato S.n.c
 
IT
Breitling for Bentley Barnato (inkl. 19% MwSt)
Breitling for Bentley Barnato (inkl. 19% MwSt)
RM27,923
Seller
Chronolux24.de
 
DE
Omega Seamaster - SMPc - Black
Omega Seamaster - SMPc - Black
RM12,511
Seller
Hoboken Watch
 
US
Breitling Chronomat 44
Breitling Chronomat 44
RM29,887
Seller
Hulpiau A
 
BE
TAG Heuer Grand Carrera Wav 5113 NEW 2018
TAG Heuer Grand Carrera Wav 5113 NEW 2018
RM10,885
Seller
TOP WATCHES
 
IT
Breitling Superocean Héritage 46
Breitling Superocean Héritage 46
RM12,201
Seller
Time and Design
 
CH
Rolex Sea-Dweller
Rolex Sea-Dweller
RM59,158
Seller
Chronorelojes, S.L.
9
ES
Rolex Datejust
Rolex Datejust
RM15,381
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
153
DE
Omega Seamaster Planet Ocean Winter Olympics PyeongChang 2018
Omega Seamaster Planet Ocean Winter Olympics PyeongChang 2018
RM26,635
Seller
Chronos Aeon Ltd
 
UK
Tudor Hydronaut II Lady 24040
Tudor Hydronaut II Lady 24040
RM4,259
Free shipping
Seller
Ronaldowatch
10
NL
Breitling for Bentley Barnato 42 (inkl. 19%MwSt)
Breitling for Bentley Barnato 42 (inkl. 19%MwSt)
RM19,877
Seller
Chronolux24.de
 
DE
Omega Seamaster 300 - Vintage Look
Omega Seamaster 300 - Vintage Look
RM17,361
Seller
Hoboken Watch
 
US
Bulova 63B159
Bulova 63B159
RM6,872
Seller
Tick Tock Shop
 
US
TAG Heuer Carrera Calibre 1887
TAG Heuer Carrera Calibre 1887
RM19,167
Seller
FERRARINI G&C SNC
 
IT
Breitling Superocean Héritage 42
Breitling Superocean Héritage 42
RM12,201
Seller
Time and Design
 
CH
Rolex Oyster Perpetual Datejust - S&G - Diamond Hours - 36mm
Rolex Oyster Perpetual Datejust - S&G - Diamond Hours - 36mm
RM21,497
Seller
Timespec
 
UK
Rolex GMT Master II
Rolex GMT Master II
RM111,217
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
153
DE
Omega Seamaster Aqua Terra Diamonds Rose Gold&Steel
Omega Seamaster Aqua Terra Diamonds Rose Gold&Steel
RM21,254
Seller
its time for watch
7
UK
Breitling Chronomat 44 Airborne
Breitling Chronomat 44 Airborne
RM29,887
Seller
Hulpiau A
 
BE
Breitling Superocean Chronograph Steelfish
Breitling Superocean Chronograph Steelfish
RM17,747
Seller
Keuvelaar Juweliers Diamantairs
6
NL
Rolex Explorer 214270 - Lume Dial
Rolex Explorer 214270 - Lume Dial
RM24,233
Seller
Hoboken Watch
 
US
Omega De Ville Hour Vision
Omega De Ville Hour Vision
RM19,995
Seller
Au Bijou GmbH - Juwelier seit 1967
 
CH
Omega Constellation
Omega Constellation
RM4,023
Free shipping
Seller
Ronaldowatch
10
NL
Breitling Superocean Héritage Chronograph
Breitling Superocean Héritage Chronograph
RM16,934
Seller
Time and Design
 
CH
Rolex Yacht-Master
Rolex Yacht-Master
RM26,904
Seller
Timespec
 
UK
Rolex Yacht Master
Rolex Yacht Master
RM42,594
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
153
DE
Rolex  Daytona Ref/116520 DLC Skeleton MAD
Rolex Daytona Ref/116520 DLC Skeleton MAD
RM117,843
Seller
WMC
 
FR
Rolex Oyster Perpetual Air King Automatic Mens Watch 114234
Rolex Oyster Perpetual Air King Automatic Mens Watch 114234
RM18,190
Free shipping
Seller
CJ Charles Jewelers
 
US
TAG Heuer Grand Carrera
TAG Heuer Grand Carrera
RM13,452
Seller
Stephen Hughes Limited
 
UK
Omega Seamaster - SMPc - Blue
Omega Seamaster - SMPc - Blue
RM12,511
Seller
Hoboken Watch
 
US
Bulgari Diagono
Bulgari Diagono
RM12,636
Seller
Kairos Premium Outlet , Unipessoal Limitada
 
PT
Breitling Chronomat 44
Breitling Chronomat 44
RM25,414
Seller
Hulpiau A
 
BE
Rolex Datejust
Rolex Datejust
RM19,995
Seller
Time and Design
 
CH
Omega De Ville
Omega De Ville
RM13,725
Seller
Saarbrücker Pfandleihhaus GmbH
7
DE
Omega Seamaster Co Axial Chronometer
Omega Seamaster Co Axial Chronometer
RM13,251
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
153
DE
Audemars Piguet Royal Oak Offshore Chronograph Last Generation
Audemars Piguet Royal Oak Offshore Chronograph Last Generation
RM75,249
Seller
WMC
 
FR
Breitling For Bentley Chronograph A44362
Breitling For Bentley Chronograph A44362
RM26,274
Free shipping
Seller
CJ Charles Jewelers
 
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.

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