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Rolex Vintage Turn-O-Graph 6202 mit Box und Papieren aus 1955
TOP
Rolex Vintage Turn-O-Graph 6202 mit Box und Papieren aus 1955
S$ 52,906
Seller
TimeElements
31
DE
Rolex GMT-Master II 116759SARU june 2020 Rolex warranty
TOP
Rolex GMT-Master II 116759SARU june 2020 Rolex warranty
S$ 102,637
Seller
MMC RIVIERA
6
MC
Rolex Day-Date 40 18 kt Weißgold Schwarz DIA 228239
TOP
Rolex Day-Date 40 18 kt Weißgold Schwarz DIA 228239
S$ 51,864
Seller
Uhren2000 GmbH
366
DE
Hermès Clipper XL Automatic - Box & inhouse certificate
TOP
Hermès Clipper XL Automatic - Box & inhouse certificate
S$ 4,089
Free shipping
Seller
Pawndeluxe
191
NL
Omega De Ville Chronometer Ref: 45003100
Omega De Ville Chronometer Ref: 45003100
S$ 2,590
Seller
MARTIN LUXURY PTE LTD
SG
TAG Heuer Monza Chronograph 18K Gold Limited Edition Automatic
TAG Heuer Monza Chronograph 18K Gold Limited Edition Automatic
S$ 9,787
Seller
Lu-Ann Vintage Collection
 
SG
Vacheron Constantin --------
Vacheron Constantin --------
S$ 33,333
Seller
Private Seller
SG
Omega CONSTELLATION OMEGA CO-AXIAL 38 MM ROSE GOLD
TOP
Omega CONSTELLATION OMEGA CO-AXIAL 38 MM ROSE GOLD
S$ 17,350
Seller
Plus Watch - Luxury Watches
2993
IT
Gérald Genta Arena Sport Retro SSPL10 Men's Watch - Papers
TOP
Gérald Genta Arena Sport Retro SSPL10 Men's Watch - Papers
S$ 4,170
Free shipping
Seller
Pawndeluxe
191
NL
Rolex GMT-Master II 116758SARU
Rolex GMT-Master II 116758SARU
S$ 209,527
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
236
UK
Breitling Chronomat 44
TOP
Breitling Chronomat 44
S$ 6,999
Seller
Private Seller
SG
Breitling Bentley Supersport
Breitling Bentley Supersport
S$ 7,056
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
289
DE
Rolex Datejust II
Rolex Datejust II
S$ 16,590
Seller
MARTIN LUXURY PTE LTD
SG
Rolex DayDate Original Factory diamonds dial
Rolex DayDate Original Factory diamonds dial
S$ 13,982
Seller
Lu-Ann Vintage Collection
 
SG
Panerai Luminor Power Reserve PAM27
Panerai Luminor Power Reserve PAM27
S$ 9,850
Seller
Monster Time Gallery
SG
IWC Portuguese Chronograph 41mm IW371445 Ex IW371401
IWC Portuguese Chronograph 41mm IW371445 Ex IW371401
S$ 9,125
Free shipping
Seller
SORELLE RONCO
779
IT
Breitling Galactic 36 Automatic Steel & Rose Gold
Breitling Galactic 36 Automatic Steel & Rose Gold
S$ 6,292
Seller
King Jewelers
 
US
Rolex Vintage Oyster Perpetual Datejust Ref 1601 (Year 1970)
Rolex Vintage Oyster Perpetual Datejust Ref 1601 (Year 1970)
S$ 3,950
Seller
Asia Timepiece Centre
SG
Rolex Explorer II Steve McQueen 1655
Rolex Explorer II Steve McQueen 1655
S$ 36,348
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
236
UK
Bulgari Carbon Gold
Bulgari Carbon Gold
S$ 3,207
Seller
MEGA WATCHES
9
IT
Rolex Sea Dweller
Rolex Sea Dweller
S$ 18,362
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
289
DE
B.R.M CT-48-AR
TOP
B.R.M CT-48-AR
S$ 19,084
Free shipping
Seller
Solexport International
MU
TAG Heuer Monza Chronograph Cal 36
TAG Heuer Monza Chronograph Cal 36
S$ 5,802
Seller
Lu-Ann Vintage Collection
 
SG
Rolex Datejust 41mm Slate Oyster 2018 verklebt
Rolex Datejust 41mm Slate Oyster 2018 verklebt
S$ 13,231
Seller
LUXUS-PORT
52
DE
Omega Seamaster AQUA TERRA Co-Axial Master Chronometer.Steel
Omega Seamaster AQUA TERRA Co-Axial Master Chronometer.Steel
S$ 6,335
Free shipping
Seller
SORELLE RONCO
779
IT
Panerai Luminor Submersible 1950 Carbotech, 3 Days PAM 00616
Panerai Luminor Submersible 1950 Carbotech, 3 Days PAM 00616
S$ 24,841
Seller
time4watches GmbH
24
DE
Rolex Submariner Date
Rolex Submariner Date
S$ 9,243
Seller
Uhrmageren.com
11
DK
Rolex Unworn Daytona 116509
Rolex Unworn Daytona 116509
S$ 45,094
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
236
UK
Rolex Oyster Perpetual - Ref: 1002 - 71/72 - Service 08.18
Rolex Oyster Perpetual - Ref: 1002 - 71/72 - Service 08.18
S$ 4,490
Seller
mostwantedwatches MWW GmbH
 
DE
Rolex Yacht Master Damenuhr
Rolex Yacht Master Damenuhr
S$ 14,433
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
289
DE
B.R.M DDF-12-44-SQ-AJ
TOP
B.R.M DDF-12-44-SQ-AJ
S$ 16,021
Free shipping
Seller
Solexport International
MU
Chopard Tycoon XL Two O Ten Chronograph
Chopard Tycoon XL Two O Ten Chronograph
S$ 4,474
Seller
Lu-Ann Vintage Collection
 
SG
Rolex 16700 16700 GMT Master Red / Blue Pepsi Bezel (29479)
Rolex 16700 16700 GMT Master Red / Blue Pepsi Bezel (29479)
S$ 15,240
Seller
European Watch Company
170
US
Breitling SUPER AVENGER II Chrono 48mm Steel Black Chablon Dial
Breitling SUPER AVENGER II Chrono 48mm Steel Black Chablon Dial
S$ 6,094
Free shipping
Seller
SORELLE RONCO
779
IT
Rolex Sea-Dweller 4000, Ref. 116600, Full Set, LC100
Rolex Sea-Dweller 4000, Ref. 116600, Full Set, LC100
S$ 16,983
Seller
time4watches GmbH
24
DE
Breitling Navitimer World aus 2016 , Full Set, MINT Condition
Breitling Navitimer World aus 2016 , Full Set, MINT Condition
S$ 6,415
Seller
LUXUS-PORT
52
DE
Rolex Rare Date Automatic Steel 1530
Rolex Rare Date Automatic Steel 1530
S$ 13,665
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
236
UK
Rolex Explorer II - Ref: 16570 - aus 2005 - Rolex Box&Papers
Rolex Explorer II - Ref: 16570 - aus 2005 - Rolex Box&Papers
S$ 9,622
Seller
mostwantedwatches MWW GmbH
 
DE
Rolex Submariner
Rolex Submariner
S$ 28,626
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
289
DE
Omega Diver 300M Co-Axial 41mm 212.30.41.20.01.003
Omega Diver 300M Co-Axial 41mm 212.30.41.20.01.003
S$ 4,334
Free shipping
Seller
Exquisite Timepieces
21
US
Rolex Datejust 41 Dark Rhodium 18k White Gold/Steel Jubilee...
Rolex Datejust 41 Dark Rhodium 18k White Gold/Steel Jubilee...
S$ 13,412
Seller
CKLY Trading Limited
18
HK
Rolex 116710BLNR GMT Master II Ceramic Black & Blue "Batman"...
Rolex 116710BLNR GMT Master II Ceramic Black & Blue "Batman"...
S$ 18,875
Seller
European Watch Company
170
US
Breitling Superocean 44 Special Total Blue Ocean Racer II Rubber
Breitling Superocean 44 Special Total Blue Ocean Racer II Rubber
S$ 4,346
Free shipping
Seller
SORELLE RONCO
779
IT
Rolex Yacht Master, Referenz 116622, FULL SET, LC100
Rolex Yacht Master, Referenz 116622, FULL SET, LC100
S$ 12,814
Seller
time4watches GmbH
24
DE
B.R.M V8-44-GULF
TOP
B.R.M V8-44-GULF
S$ 9,606
Free shipping
Seller
Solexport International
MU
Rolex Zenith Daytona 16528
Rolex Zenith Daytona 16528
S$ 99,297
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
236
UK
Rolex Submariner Date - Ref: 16610 - aus 1999 - Box&Papers
Rolex Submariner Date - Ref: 16610 - aus 1999 - Box&Papers
S$ 10,665
Seller
mostwantedwatches MWW GmbH
 
DE
Rolex Daydate
Rolex Daydate
S$ 21,249
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
289
DE
Omega CO-AXIAL GMT 43.5MM 232.90.44.22.03.001
Omega CO-AXIAL GMT 43.5MM 232.90.44.22.03.001
S$ 9,698
Free shipping
Seller
Exquisite Timepieces
21
US
Omega Seamaster Diver 300m Black Steel 36.25mm - 212.30.36.20....
Omega Seamaster Diver 300m Black Steel 36.25mm - 212.30.36.20....
S$ 3,531
Seller
CKLY Trading Limited
18
HK
Omega 233.32.41.21.01.001 Omega Seamaster 300M Limited Edition...
Omega 233.32.41.21.01.001 Omega Seamaster 300M Limited Edition...
S$ 16,638
Seller
European Watch Company
170
US
Breitling SUPEROCEAN II 44 Total Blue Diver Pro III Chrono...
Breitling SUPEROCEAN II 44 Total Blue Diver Pro III Chrono...
S$ 3,961
Free shipping
Seller
SORELLE RONCO
779
IT
Rolex Sea-Dweller Deepsea, V-Serie, 116660, MK I, Full Set, LC100
Rolex Sea-Dweller Deepsea, V-Serie, 116660, MK I, Full Set, LC100
S$ 13,455
Seller
time4watches GmbH
24
DE
Omega Seamaster Diver 300 M Co-Axial 41 mm
Omega Seamaster Diver 300 M Co-Axial 41 mm
S$ 4,019
Seller
Millennium Watches
 
SE
Rolex Datejust 69173
Rolex Datejust 69173
S$ 5,739
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
236
UK
Rolex Datejust- Ref: 16220 - aus 1998 - Rolex Box&Papiere
Rolex Datejust- Ref: 16220 - aus 1998 - Rolex Box&Papiere
S$ 7,217
Seller
mostwantedwatches MWW GmbH
 
DE
Omega Seamaster Automatic Chrono
Omega Seamaster Automatic Chrono
S$ 3,929
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
289
DE
Omega Seamaster Aqua Terra
Omega Seamaster Aqua Terra
S$ 3,769
Seller
Watch Planet
 
LT
Omega Seamaster Planet Ocean 600M Master Chronometer Black...
Omega Seamaster Planet Ocean 600M Master Chronometer Black...
S$ 5,796
Seller
CKLY Trading Limited
18
HK
Rolex 116610LV Submariner Green Ceramic Bezel Green Dial...
Rolex 116610LV Submariner Green Ceramic Bezel Green Dial...
S$ 18,875
Seller
European Watch Company
170
US
Omega Seamaster Rio 2016 Limited Edition  Olympic Collection Rio
Omega Seamaster Rio 2016 Limited Edition Olympic Collection Rio
S$ 6,335
Free shipping
Seller
SORELLE RONCO
779
IT
Rolex GMT Master II, Z-Serie, 16710 BLRO, Rectangular, 3186
Rolex GMT Master II, Z-Serie, 16710 BLRO, Rectangular, 3186
S$ 24,039
Seller
time4watches GmbH
24
DE
Rolex Sea-dweller 126600 – New Model
Rolex Sea-dweller 126600 – New Model
S$ 18,443
Seller
Mall of the Watch
866
MC
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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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