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Rolex Texan Beta 21 Vintage 5100
TOP
Rolex Texan Beta 21 Vintage 5100
AU$ 142,604
Free shipping
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Watches & Jewellery of Bond Street Ltd
168
UK
Rolex GMT-Master II 116758SARU
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Rolex GMT-Master II 116758SARU
AU$ 86,821
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MMC RIVIERA
5
MC
Hublot King Power F1 India,  Ltd Edition, Box & Papers
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Hublot King Power F1 India, Ltd Edition, Box & Papers
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99
UK
Hublot Big Bang Chronograph 44mm Limited Edition XX/10
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Hublot Big Bang Chronograph 44mm Limited Edition XX/10
AU$ 14,178
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Joaillerie Royale
473
BE
Rolex Datejust Diamond Watch
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AU$ 23,000
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ELITADIAMONDS
AU
Breitling Superocean Héritage 46
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Breitling Superocean Héritage 46
AU$ 3,800
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Private Seller
 
AU
Rolex Day-Date President Pink MOP Roman  Diamond Dial Bezel 18038
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Rolex Day-Date President Pink MOP Roman Diamond Dial Bezel 18038
AU$ 20,716
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Watch My Diamonds
105
US
Breitling Navitimer World Breitling
Breitling Navitimer World Breitling
AU$ 6,000
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AU
Sinn 103 St Sa RB Classic Watch Sondermodell
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Sinn 103 St Sa RB Classic Watch Sondermodell
AU$ 3,903
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Classic Watch
17
DE
Hublot Big Bang Carbon Bezel Baguette 24000€ HT
TOP
Hublot Big Bang Carbon Bezel Baguette 24000€ HT
AU$ 45,880
Seller
RIVIERAWATCH
79
FR
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
AU$ 9,668
Seller
Private Seller
 
AU
Rolex Sea-Dweller
Rolex Sea-Dweller
AU$ 19,990
Seller
Private Seller
AU
Omega De Ville Hour Vision (Blue - Orbis)
Omega De Ville Hour Vision (Blue - Orbis)
AU$ 7,200
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Private Seller
AU
Breitling Galactic 32
Breitling Galactic 32
AU$ 4,645
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Private Seller
AU
Chopard Mille Miglia
Chopard Mille Miglia
AU$ 7,044
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Private Seller
 
AU
Rolex Oyster Perpetual 36 Ref. 116000 Zifferblatt Silber A
TOP
Rolex Oyster Perpetual 36 Ref. 116000 Zifferblatt Silber A
AU$ 7,089
Seller
Uhren2000 GmbH
324
DE
Breitling Navitimer Fighters Chronograph A13330 Full Set
Breitling Navitimer Fighters Chronograph A13330 Full Set
AU$ 5,170
Seller
The Watch Culture
AU
Ball Watch for BMW GMT
Ball Watch for BMW GMT
AU$ 3,000
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AU
Omega Seamaster Professional 300M
Omega Seamaster Professional 300M
AU$ 4,500
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Watch Trader Pty Ltd
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Swiss Military Cx Swiss Military 20000 Feet Watch World Record...
Swiss Military Cx Swiss Military 20000 Feet Watch World Record...
AU$ 4,435
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Watchpartners
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Rolex GMT Master II
Rolex GMT Master II
AU$ 11,470
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
171
DE
Rolex Submariner Date
Rolex Submariner Date
AU$ 11,446
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TenerifeWatches
 
ES
Omega Speedmaster Apollo 11 Pro von 2005, Limited Edition,...
Omega Speedmaster Apollo 11 Pro von 2005, Limited Edition,...
AU$ 14,321
Free shipping
Seller
chronopark GmbH
 
DE
Omega Seamaster Aqua Terra
Omega Seamaster Aqua Terra
AU$ 18,388
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Dragon Watch
 
HK
Panerai Radiomir Chronograph 42 mm Ref. PAM00369
TOP
Panerai Radiomir Chronograph 42 mm Ref. PAM00369
AU$ 8,953
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Uhren2000 GmbH
324
DE
TAG Heuer Sport Elegance Link SEL  WG5113 Automatic
TAG Heuer Sport Elegance Link SEL WG5113 Automatic
AU$ 990
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The Watch Culture
AU
Hentschel H1 Chronometer White Gold / Steel, 39.5mm German...
Hentschel H1 Chronometer White Gold / Steel, 39.5mm German...
AU$ 10,500
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Define Watches
 
AU
Omega SPEEDMASTER 1957 '50TH ANNIVERSARY
Omega SPEEDMASTER 1957 '50TH ANNIVERSARY
AU$ 13,121
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EXPERTYCO
 
PL
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
AU$ 4,435
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Watchpartners
AU
Rolex Datejust
Rolex Datejust
AU$ 4,699
Free shipping
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A. Grimmeissen Uhren An- und Verkauf
171
DE
Hamilton Khaki X-Wind
Hamilton Khaki X-Wind
AU$ 1,983
Seller
MA Comaposada
 
ES
Omega 42mm Seamaster Planet Ocean Chronometer von 2016,...
Omega 42mm Seamaster Planet Ocean Chronometer von 2016,...
AU$ 5,560
Free shipping
Seller
chronopark GmbH
 
DE
Breitling Super Ocean II
Breitling Super Ocean II
AU$ 2,761
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Chronostore
 
US
Tudor Heritage Black Bay Automatik Dark 79230DK Lederband
TOP
Tudor Heritage Black Bay Automatik Dark 79230DK Lederband
AU$ 4,524
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Uhren2000 GmbH
324
DE
Rolex Explorer II Custom PVD/DLC Ref.16570T
Rolex Explorer II Custom PVD/DLC Ref.16570T
AU$ 8,450
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The Watch Culture
AU
Omega Seamaster Planet Ocean Chronograph
Omega Seamaster Planet Ocean Chronograph
AU$ 5,397
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TenerifeWatches
 
ES
Rolex Submariner Date 40mm
Rolex Submariner Date 40mm
AU$ 12,266
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EXPERTYCO
 
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Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
AU$ 4,435
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Watchpartners
AU
Rolex Datejust II
Rolex Datejust II
AU$ 8,204
Free shipping
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A. Grimmeissen Uhren An- und Verkauf
171
DE
Hublot Big Bang 45 MM Unico King Gold Ceramic
Hublot Big Bang 45 MM Unico King Gold Ceramic
AU$ 40,623
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MW Sportive GMBH
6
DE
Breitling Roségold Montbrillant Olympus Chrono Limited...
Breitling Roségold Montbrillant Olympus Chrono Limited...
AU$ 14,321
Free shipping
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chronopark GmbH
 
DE
Omega Seamaster
Omega Seamaster
AU$ 4,418
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Chronostore
 
US
Rolex Submariner Date Tritium Flat4
Rolex Submariner Date Tritium Flat4
AU$ 9,495
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chronostars
5
AT
Breitling Chronomat Windrider MOP Dial A13352
Breitling Chronomat Windrider MOP Dial A13352
AU$ 3,750
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The Watch Culture
AU
Mühle Glashütte Teutonia II Großdatum M1-33-76-L Limitiert No....
Mühle Glashütte Teutonia II Großdatum M1-33-76-L Limitiert No....
AU$ 3,540
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Paul Winnebeck
13
DE
Rolex Sea-Dweller Deepsea
Rolex Sea-Dweller Deepsea
AU$ 16,022
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EXPERTYCO
 
PL
Omega Seamaster Diver 300 M Chronometer Co-Axial Blue Dial
Omega Seamaster Diver 300 M Chronometer Co-Axial Blue Dial
AU$ 3,867
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Koosh Jewelers
 
US
Rolex GMT Master II
Rolex GMT Master II
AU$ 15,851
Free shipping
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A. Grimmeissen Uhren An- und Verkauf
171
DE
Zenith El Primero Chronomaster Open Heart Power Reserve
Zenith El Primero Chronomaster Open Heart Power Reserve
AU$ 4,874
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PUH Radosław Kalyciok
 
PL
Omega 41,5mm Speedmaster '57 Co-Axial Chronograph, B&P, Ref....
Omega 41,5mm Speedmaster '57 Co-Axial Chronograph, B&P, Ref....
AU$ 7,312
Free shipping
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chronopark GmbH
 
DE
Breitling Chronomat
Breitling Chronomat
AU$ 8,286
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Chronostore
 
US
Maurice Lacroix Masterpiece Croneo COSC Roger Federer Special...
Maurice Lacroix Masterpiece Croneo COSC Roger Federer Special...
AU$ 5,177
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MA Comaposada
 
ES
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
AU$ 3,600
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The Watch Culture
AU
Rolex GMT-Master II
Rolex GMT-Master II
AU$ 11,135
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Uhrenhandel Eva Krause
 
DE
Rolex GMT-Master II 40mm
Rolex GMT-Master II 40mm
AU$ 12,266
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EXPERTYCO
 
PL
TAG Heuer Kirium Chronometer Ref. WL5113
TAG Heuer Kirium Chronometer Ref. WL5113
AU$ 1,195
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online pfand
7
DE
Breitling Chronomat 01 Glasboden
Breitling Chronomat 01 Glasboden
AU$ 8,363
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
171
DE
Zenith El Primero Class 4
Zenith El Primero Class 4
AU$ 3,249
Seller
PUH Radosław Kalyciok
 
PL
Breitling Windrider Cockpit 41 UTC Big Date 18k Rosègold / Stahl
Breitling Windrider Cockpit 41 UTC Big Date 18k Rosègold / Stahl
AU$ 6,356
Free shipping
Seller
chronopark GmbH
 
DE
Breitling Superocean
Breitling Superocean
AU$ 4,695
Seller
Chronostore
 
US
Hamilton VIEWMATIC RATTRAPANTE JAZZMASTER Edición limitada
Hamilton VIEWMATIC RATTRAPANTE JAZZMASTER Edición limitada
AU$ 5,098
Seller
MA Comaposada
 
ES
Panerai PAM01024  Luminor Submersible Automatic Mens 44mm XXX...
Panerai PAM01024 Luminor Submersible Automatic Mens 44mm XXX...
AU$ 9,944
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Luxury Discount Store
 
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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