Buyer Protection Authenticity Guarantee Why Chrono24? Australia  | AUD
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Rolex Sea-Dweller 126600 Unworn 50 Ann.
TOP
Rolex Sea-Dweller 126600 Unworn 50 Ann.
AU$ 19,635
Free shipping
Seller
MASTROLORENZI S.A.S DI MATTIA MASTROLORENZI & CO.
46
IT
Ulysse Nardin Marine Chronometer Manufacture Rose Gold
TOP
Ulysse Nardin Marine Chronometer Manufacture Rose Gold
AU$ 30,442
Seller
Sense of Time
 
LV
Longines Master Collection Chronograph Moonphase Calendar
Longines Master Collection Chronograph Moonphase Calendar
AU$ 2,499
Seller
Private seller
AU
Ball Watch for BMW GMT
Ball Watch for BMW GMT
AU$ 3,500
Seller
Private seller
AU
Omega De Ville Hour Vision (Blue - Orbis)
Omega De Ville Hour Vision (Blue - Orbis)
AU$ 7,500
Seller
Private seller
AU
Breitling Chronomat GT (Bi-Colour)
Breitling Chronomat GT (Bi-Colour)
AU$ 3,500
Seller
Private seller
AU
Omega Constellation
TOP
Omega Constellation
AU$ 2,500
Seller
Private seller
AU
TAG Heuer Carrera Calibre 6 Heritage COSC
TOP
TAG Heuer Carrera Calibre 6 Heritage COSC
AU$ 2,800
Seller
Private seller
AU
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
AU$ 12,251
Seller
Private seller
AU
Omega Seamaster Planet Ocean 600m Co-Axial Orange Bezel
Omega Seamaster Planet Ocean 600m Co-Axial Orange Bezel
AU$ 4,501
Free shipping
Seller
The Watch Culture
AU
Omega ICONIC US Army Ref; 2179 / CK 2179 30t2 Original Full Size
Omega ICONIC US Army Ref; 2179 / CK 2179 30t2 Original Full Size
AU$ 2,670
Seller
Hobart Town Antique Jewellery
AU
Breitling Chronomat 41
Breitling Chronomat 41
AU$ 6,851
Free shipping
Seller
Swiss Timepieces LTD
10
UK
Swiss Military Cx Swiss Military 20000 Feet Watch World Record...
Swiss Military Cx Swiss Military 20000 Feet Watch World Record...
AU$ 4,435
Free shipping
Seller
Watchpartners
AU
Breitling SuperOcean II  Abyss Yellow
Breitling SuperOcean II Abyss Yellow
AU$ 3,400
Seller
Topwatch Pty Ltd
AU
Omega Seamaster Black Dial Automatic Steel 212.30.41.20.01.003
Omega Seamaster Black Dial Automatic Steel 212.30.41.20.01.003
AU$ 4,495
Seller
Zaeger Pty Ltd
AU
Omega Seamaster aquaterra
Omega Seamaster aquaterra
AU$ 5,158
Seller
Timeandluxuryco
MX
Omega Seamaster Aqua Terra
Omega Seamaster Aqua Terra
AU$ 6,478
Seller
MALT LUXURY AG
CH
Rolex Datejust
Rolex Datejust
AU$ 12,023
Seller
Juwelier Rubin GbR
 
DE
Breitling Chronomat Windrider MOP Dial A13352
Breitling Chronomat Windrider MOP Dial A13352
AU$ 3,546
Seller
The Watch Culture
AU
Hublot 301.AI.460.RX
TOP
Hublot 301.AI.460.RX
AU$ 14,697
Seller
Deluxe ( Asia ) Ltd
8
HK
Rolex Daytona 116520 Stahl Chronograph
Rolex Daytona 116520 Stahl Chronograph
AU$ 15,967
Seller
Juwelier Rieger
98
DE
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
AU$ 4,435
Free shipping
Seller
Watchpartners
AU
Omega Seamaster 300 Spectre 007 James Bond Limited Edition
Omega Seamaster 300 Spectre 007 James Bond Limited Edition
AU$ 11,147
Seller
Swiss Horology
 
UK
Breitling Super Avenger II Diamond Set Bezel Lugs A13371
Breitling Super Avenger II Diamond Set Bezel Lugs A13371
AU$ 19,000
Seller
Zaeger Pty Ltd
AU
Rolex Rare S/S O/P UAE Air Force Pepsi Bezel GMT-Master...
Rolex Rare S/S O/P UAE Air Force Pepsi Bezel GMT-Master...
AU$ 162,923
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
65
UK
Omega Seamaster Professional 300m Automatic - 41 mm
Omega Seamaster Professional 300m Automatic - 41 mm
AU$ 2,420
Free shipping
Seller
wagener-gold International e.K.
688
DE
Longines Grande Vitesse
Longines Grande Vitesse
AU$ 2,055
Seller
Joaillerie Royale
230
BE
TAG Heuer Sport Elegance Chronometer Aut.  WG5113
TAG Heuer Sport Elegance Chronometer Aut. WG5113
AU$ 1,277
Seller
The Watch Culture
AU
Bulgari DG42BSCVDCH
TOP
Bulgari DG42BSCVDCH
AU$ 7,349
Seller
Deluxe ( Asia ) Ltd
8
HK
Rolex Sea Dweller Stahl 16600 Automatik
Rolex Sea Dweller Stahl 16600 Automatik
AU$ 8,509
Seller
Juwelier Rieger
98
DE
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
AU$ 4,435
Free shipping
Seller
Watchpartners
AU
Rolex Oyster Datejust Bark Yellow Gold Diamonds 26 mm (Full Set)
Rolex Oyster Datejust Bark Yellow Gold Diamonds 26 mm (Full Set)
AU$ 12,938
Seller
Kleen Edelmetalen
109
NL
Breitling Chronomat 44 Mens Watch Black Dial AB011012/B967
Breitling Chronomat 44 Mens Watch Black Dial AB011012/B967
AU$ 8,660
Seller
Zaeger Pty Ltd
AU
Rolex Date zaffiro art. Rd358nl
Rolex Date zaffiro art. Rd358nl
AU$ 4,262
Seller
Stroppiana SRL
214
IT
Omega - Seamaster Planet Ocean Professional Co-axial -...
Auction
Omega - Seamaster Planet Ocean Professional Co-axial -...
AU$ 3,957
Estimated price
Seller
Catawiki BV
 
Rolex Sea-Dweller 126600 Red NEW
Rolex Sea-Dweller 126600 Red NEW
AU$ 18,264
Seller
Lux Watches
 
DE
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
AU$ 3,340
Seller
The Watch Culture
AU
Montblanc 102345
TOP
Montblanc 102345
AU$ 12,216
Seller
Deluxe ( Asia ) Ltd
8
HK
Rolex Yacht Master 116622 Stahl Platin 40 mm Yacht-Master
Rolex Yacht Master 116622 Stahl Platin 40 mm Yacht-Master
AU$ 11,400
Seller
Juwelier Rieger
98
DE
Rolex Sea-Dweller DeepSea D-Blue ref. 116660
Rolex Sea-Dweller DeepSea D-Blue ref. 116660
AU$ 16,286
Seller
Eorologi
206
IT
Rolex Daytona -  Full Set
Rolex Daytona - Full Set
AU$ 21,157
Seller
PASSIONE VINTAGE
67
IT
Omega Seamaster Aqua Terra Silver Dial 231.10.39.21.02.001
Omega Seamaster Aqua Terra Silver Dial 231.10.39.21.02.001
AU$ 3,995
Seller
Zaeger Pty Ltd
AU
Rolex Explorer II SEL Scat/Gar art. Re782
Rolex Explorer II SEL Scat/Gar art. Re782
AU$ 6,849
Seller
Stroppiana SRL
214
IT
Rolex Datejust 36 Stainless Steel Fluted / Jubilee / Silver
Rolex Datejust 36 Stainless Steel Fluted / Jubilee / Silver
AU$ 8,372
Seller
Juwelier Burger, since 2001
413
NL
Omega Seamaster Professional Chronograph 300 m - Automatic -...
Omega Seamaster Professional Chronograph 300 m - Automatic -...
AU$ 2,877
Free shipping
Seller
wagener-gold International e.K.
688
DE
Omega Constellation Ref. 168.004 18k Gold Vintage
Omega Constellation Ref. 168.004 18k Gold Vintage
AU$ 10,188
Seller
Best Deals HD
 
US
Corum 895-931-06-0371-AN92
TOP
Corum 895-931-06-0371-AN92
AU$ 9,083
Seller
Deluxe ( Asia ) Ltd
8
HK
Rolex Daydate Weissgold 750 Diamanten 18239 Automatik  DayDate
Rolex Daydate Weissgold 750 Diamanten 18239 Automatik DayDate
AU$ 18,250
Seller
Juwelier Rieger
98
DE
Rolex Sea-Dweller  Deepsea D-Blue "James Cameron" 116660
Rolex Sea-Dweller Deepsea D-Blue "James Cameron" 116660
AU$ 17,885
Free shipping
Seller
Lux Watches
 
DE
Rolex Sea-Dweller - Triple Six - Full Set
Rolex Sea-Dweller - Triple Six - Full Set
AU$ 13,394
Seller
PASSIONE VINTAGE
67
IT
Rolex Explorer II White dial Stainless Steel GMT 216570 WSO
Rolex Explorer II White dial Stainless Steel GMT 216570 WSO
AU$ 9,995
Seller
Zaeger Pty Ltd
AU
Rolex submariner art. Rb639
Rolex submariner art. Rb639
AU$ 7,534
Seller
Stroppiana SRL
214
IT
Rolex Sea-Dweller
Rolex Sea-Dweller
AU$ 8,372
Seller
Juwelier Burger, since 2001
413
NL
TAG Heuer Aquaracer Calibre 5Ref. WAY211C –Wristwatch–Modern
Auction
TAG Heuer Aquaracer Calibre 5Ref. WAY211C –Wristwatch–Modern
AU$ 1,674
Estimated price
Seller
Catawiki BV
 
Omega Seamaster Aqua Terra
Omega Seamaster Aqua Terra
AU$ 4,279
Seller
PRESTIGE WATCHES AND JEWELLERY
9
UK
Rolex Yacht Master Men's Watch Platinum 116622 3683
Rolex Yacht Master Men's Watch Platinum 116622 3683
AU$ 13,195
Seller
Plus Watch - Luxury Watches
2132
IT
Rolex Oyster Perpetual 39 mm
Rolex Oyster Perpetual 39 mm
AU$ 6,239
Seller
Uhrencenter Berlin
190
DE
Rolex Oyster Datejust II Jubilee Steel Blue Dial 41 mm (Full Set)
Rolex Oyster Datejust II Jubilee Steel Blue Dial 41 mm (Full Set)
AU$ 9,285
Seller
Kleen Edelmetalen
109
NL
Breitling : Navitimer :  A23322 :  Stainless Steel
Breitling : Navitimer : A23322 : Stainless Steel
AU$ 5,577
Seller
BernardWatch.com
125
US
Breitling Chronomat Black Dial 18k Rose Gold & Steel CB011012
Breitling Chronomat Black Dial 18k Rose Gold & Steel CB011012
AU$ 14,990
Seller
Zaeger Pty Ltd
AU

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.