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Hermès Clipper XL Automatic - Box & inhouse certificate
TOP
Hermès Clipper XL Automatic - Box & inhouse certificate
AU$ 4,201
Free shipping
Seller
Pawndeluxe
184
NL
Rolex Zenith Daytona 16528
TOP
Rolex Zenith Daytona 16528
AU$ 101,977
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Rolex Datejust II
Rolex Datejust II
AU$ 8,950
Seller
Master Watchmaking P/L
AU
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
AU$ 9,958
Seller
Private Seller
 
AU
Omega CONSTELLATION OMEGA CO-AXIAL 38 MM ROSE GOLD
TOP
Omega CONSTELLATION OMEGA CO-AXIAL 38 MM ROSE GOLD
AU$ 17,824
Seller
Plus Watch - Luxury Watches
2979
IT
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
AU$ 4,435
Seller
Watchpartners
AU
Rolex Datejust II Collector Estate Watch
TOP
Rolex Datejust II Collector Estate Watch
AU$ 15,648
Seller
Private Seller
AU
Gérald Genta Arena Sport Retro SSPL10 Men's Watch - Papers
TOP
Gérald Genta Arena Sport Retro SSPL10 Men's Watch - Papers
AU$ 4,283
Free shipping
Seller
Pawndeluxe
184
NL
Hentschel H1 Chronometer White Gold / Steel, 39.5mm German...
Hentschel H1 Chronometer White Gold / Steel, 39.5mm German...
AU$ 10,500
Seller
Define Watches
 
AU
Breitling Superocean 44
Breitling Superocean 44
AU$ 4,000
Seller
Private Seller
AU
Rolex GMT-Master II 116759SARU june 2020 Rolex warranty
TOP
Rolex GMT-Master II 116759SARU june 2020 Rolex warranty
AU$ 105,437
Seller
MMC RIVIERA
6
MC
Rolex Datejust 36
Rolex Datejust 36
AU$ 11,900
Seller
Master Watchmaking P/L
AU
TAG Heuer Link
TAG Heuer Link
AU$ 1,750
Seller
Private Seller
AU
Omega Seamaster Diver 300 M
Omega Seamaster Diver 300 M
AU$ 3,694
Seller
Private Seller
 
AU
Chopard Mille Miglia
Chopard Mille Miglia
AU$ 6,401
Seller
Private Seller
 
AU
Ball Watch for BMW GMT
Ball Watch for BMW GMT
AU$ 2,400
Seller
Private Seller
 
AU
Swiss Military Cx Swiss Military 20000 Feet Watch World Record...
Swiss Military Cx Swiss Military 20000 Feet Watch World Record...
AU$ 4,435
Seller
Watchpartners
AU
Breitling Galactic 32
Breitling Galactic 32
AU$ 4,645
Seller
Private Seller
 
AU
Chopard Mille Miglia Gran Turismo XL - Limited Edition Box &...
TOP
Chopard Mille Miglia Gran Turismo XL - Limited Edition Box &...
AU$ 5,601
Free shipping
Seller
Pawndeluxe
184
NL
Omega Speedmaster Racing Stainless Steel 326.32.40.50.01.001
Omega Speedmaster Racing Stainless Steel 326.32.40.50.01.001
AU$ 3,995
Seller
Zaeger Pty Ltd
AU
Rolex Datejust Turn-O-Graph
Rolex Datejust Turn-O-Graph
AU$ 4,900
Seller
Master Watchmaking P/L
AU
Rolex Sea-Dweller
Rolex Sea-Dweller
AU$ 19,900
Seller
SWISS TIME MACHINE
AU
Breitling Navitimer Fighters Chronograph A13330 Full Set
Breitling Navitimer Fighters Chronograph A13330 Full Set
AU$ 5,170
Seller
The Watch Culture
AU
Rolex GMT-Master II 116758SARU
Rolex GMT-Master II 116758SARU
AU$ 215,181
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Sinn 103 St Sa RB Classic Watch Sondermodell
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
AU$ 4,036
Seller
Classic Watch
22
DE
Omega Seamaster Aqua Terra
Omega Seamaster Aqua Terra
AU$ 8,995
Seller
Toorak Fine Watches
AU
Rolex Datejust  Damenuhr
Rolex Datejust Damenuhr
AU$ 3,213
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
281
DE
Omega Seamaster 300M Co-Axial
Omega Seamaster 300M Co-Axial
AU$ 4,500
Seller
Watch Trader Pty Ltd
AU
Omega De Ville Co-Axil Chronoscope Stainless Steel 4850.50.31
Omega De Ville Co-Axil Chronoscope Stainless Steel 4850.50.31
AU$ 4,995
Seller
Zaeger Pty Ltd
AU
Ikepod Megapode
Ikepod Megapode
AU$ 5,390
Seller
Master Watchmaking P/L
AU
Breitling Galactic 36 Automatic Steel & Rose Gold
Breitling Galactic 36 Automatic Steel & Rose Gold
AU$ 6,401
Seller
King Jewelers
 
US
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
AU$ 3,600
Seller
The Watch Culture
AU
Rolex GMT-Master Vintage UAE Air Force 1675
Rolex GMT-Master Vintage UAE Air Force 1675
AU$ 177,758
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
IWC Portuguese Chronograph 41mm IW371445 Ex IW371401
IWC Portuguese Chronograph 41mm IW371445 Ex IW371401
AU$ 9,374
Free shipping
Seller
SORELLE RONCO
766
IT
Rolex Datejust 41 Dark Rhodium 18k White Gold/Steel Jubilee...
Rolex Datejust 41 Dark Rhodium 18k White Gold/Steel Jubilee...
AU$ 14,066
Seller
CKLY Trading Limited
14
HK
Rolex Daydate
Rolex Daydate
AU$ 21,829
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
281
DE
Rolex Datejust 41mm Slate Oyster 2018 verklebt
Rolex Datejust 41mm Slate Oyster 2018 verklebt
AU$ 13,591
Seller
LUXUS-PORT
52
DE
Breitling Chronomat 44 GMT Blue Dial AB042011/C851-375A
Breitling Chronomat 44 GMT Blue Dial AB042011/C851-375A
AU$ 10,995
Seller
Zaeger Pty Ltd
AU
Rolex Oyster Perpetual
Rolex Oyster Perpetual
AU$ 5,450
Seller
Master Watchmaking P/L
AU
Rolex GMT Master II, Z-Serie, 16710 BLRO, Rectangular, 3186
Rolex GMT Master II, Z-Serie, 16710 BLRO, Rectangular, 3186
AU$ 24,695
Seller
time4watches GmbH
23
DE
Breitling Chronomat Windrider MOP Dial A13352
Breitling Chronomat Windrider MOP Dial A13352
AU$ 3,750
Seller
The Watch Culture
AU
Rolex Daytona 116523
Rolex Daytona 116523
AU$ 18,244
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Omega Seamaster AQUA TERRA Co-Axial Master Chronometer.Steel
Omega Seamaster AQUA TERRA Co-Axial Master Chronometer.Steel
AU$ 6,507
Free shipping
Seller
SORELLE RONCO
766
IT
Omega Seamaster Planet Ocean 600M Master Chronometer Black...
Omega Seamaster Planet Ocean 600M Master Chronometer Black...
AU$ 5,899
Seller
CKLY Trading Limited
14
HK
Breitling Bentley Supersport
Breitling Bentley Supersport
AU$ 7,249
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
281
DE
Omega 233.32.41.21.01.001 Omega Seamaster 300M Limited Edition...
Omega 233.32.41.21.01.001 Omega Seamaster 300M Limited Edition...
AU$ 16,928
Seller
European Watch Company
168
US
TAG Heuer Carrera Calibre HEUER02T CAR5A90.BH0742
TAG Heuer Carrera Calibre HEUER02T CAR5A90.BH0742
AU$ 16,995
Seller
Zaeger Pty Ltd
AU
Breitling Crosswind Racing
Breitling Crosswind Racing
AU$ 4,400
Seller
Master Watchmaking P/L
AU
Rolex Yacht Master, Referenz 116622, FULL SET, LC100
Rolex Yacht Master, Referenz 116622, FULL SET, LC100
AU$ 13,163
Seller
time4watches GmbH
23
DE
Breitling Navitimer World aus 2016 , Full Set, MINT Condition
Breitling Navitimer World aus 2016 , Full Set, MINT Condition
AU$ 6,590
Seller
LUXUS-PORT
52
DE
Rolex Submariner Non-Date 5512
Rolex Submariner Non-Date 5512
AU$ 73,910
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Breitling Superocean 44 Special Total Blue Ocean Racer II Rubber
Breitling Superocean 44 Special Total Blue Ocean Racer II Rubber
AU$ 4,465
Free shipping
Seller
SORELLE RONCO
766
IT
Omega Seamaster Aqua Terra 150M Master Chronometer Blue Steel...
Omega Seamaster Aqua Terra 150M Master Chronometer Blue Steel...
AU$ 5,191
Seller
CKLY Trading Limited
14
HK
Rolex Submariner
Rolex Submariner
AU$ 29,407
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
281
DE
B.R.M DDF-12-44-SQ-AJ
TOP
B.R.M DDF-12-44-SQ-AJ
AU$ 16,458
Free shipping
Seller
Solexport International
MU
Omega Seamaster Planet Ocean Deep Black 215.92.46.22.01.001
Omega Seamaster Planet Ocean Deep Black 215.92.46.22.01.001
AU$ 10,995
Seller
Zaeger Pty Ltd
AU
Rolex Lady-Datejust
Rolex Lady-Datejust
AU$ 9,450
Seller
Master Watchmaking P/L
AU
Rolex Sea-Dweller Deepsea, V-Serie, 116660, MK I, Full Set, LC100
Rolex Sea-Dweller Deepsea, V-Serie, 116660, MK I, Full Set, LC100
AU$ 13,822
Seller
time4watches GmbH
23
DE
Rolex 116710BLNR GMT Master II Ceramic Black & Blue "Batman"...
Rolex 116710BLNR GMT Master II Ceramic Black & Blue "Batman"...
AU$ 19,204
Seller
European Watch Company
168
US
Rolex Submariner Date 16613
Rolex Submariner Date 16613
AU$ 12,630
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Breitling SUPER AVENGER II Chrono 48mm Steel Black Chablon Dial
Breitling SUPER AVENGER II Chrono 48mm Steel Black Chablon Dial
AU$ 6,260
Free shipping
Seller
SORELLE RONCO
766
IT
Omega Seamaster Diver 300m Black Steel 36.25mm - 212.30.36.20....
Omega Seamaster Diver 300m Black Steel 36.25mm - 212.30.36.20....
AU$ 3,594
Seller
CKLY Trading Limited
14
HK
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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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