Buyer Protection Authenticity Guarantee Why Chrono24? Thailand  | THB
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Chopard L.U.C Tourbillon Heritage 161911-9001 RRP £152,800 Ltd Ed
TOP
Chopard L.U.C Tourbillon Heritage 161911-9001 RRP £152,800 Ltd Ed
฿1,648,589
Seller
The Watch Directory
39
UK
Rolex Daytona Gents Vintage Steel
TOP
Rolex Daytona Gents Vintage Steel
฿3,055,386
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
85
UK
Sinn 103 St Sa RB Classic Watch Sondermodell
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
฿93,313
Seller
Classic Watch
 
DE
Omega Seamaster 300M Professional James Bond Serviced  &...
TOP
Omega Seamaster 300M Professional James Bond Serviced &...
฿75,743
Free shipping
Seller
WatchPA
7
SI
Ulysse Nardin Classico Paul David Nardin
TOP
Ulysse Nardin Classico Paul David Nardin
฿234,258
Seller
Sense of Time
6
LV
Omega Speedmaster 38mm Diamonds 3815.71.53 TOTAL BLACK  FRIDAY
TOP
Omega Speedmaster 38mm Diamonds 3815.71.53 TOTAL BLACK FRIDAY
฿151,487
Seller
Fratelli Monterisi Gioielli S.r.L.
 
IT
Louis Moinet Memoris Red Eclipse
Louis Moinet Memoris Red Eclipse
฿3,699,482
BrandBoutique Member
Louis Moinet
Omega Constellation
Omega Constellation
฿54,665
Seller
World Wide Watch Shop
TH
Rolex Submariner Non-Date 14060M LC100 FULLSET inkl. Zertifikat
Rolex Submariner Non-Date 14060M LC100 FULLSET inkl. Zertifikat
฿232,306
Seller
Auktionskontor Hamburg
5
DE
Rolex Datejust
Rolex Datejust
฿185,000
Seller
Ladda Shop
TH
Panerai For Ferrari | A Limited Edition Stainless Steel...
Auction
Panerai For Ferrari | A Limited Edition Stainless Steel...
฿85,084
Estimated price
Seller
Sotheby´s
 
Rolex Daytona
Rolex Daytona
฿996,894
Seller
chasovshik.ru
RU
Rolex Sea-Dweller Deepsea
Rolex Sea-Dweller Deepsea
฿483,366
Seller
CARR
UK
Panerai LUMINOR MARINA 8 DAYS ACCIAIO PAM 590 Q
Panerai LUMINOR MARINA 8 DAYS ACCIAIO PAM 590 Q
฿196,062
Seller
NOSTIME
KR
Hublot 301.AI.460.RX
TOP
Hublot 301.AI.460.RX
฿336,082
Seller
Deluxe ( Asia ) Ltd
12
HK
Louis Moinet Memoris
Louis Moinet Memoris
฿1,846,042
BrandBoutique Member
Louis Moinet
TAG Heuer Grand Carrera Caribre6
TAG Heuer Grand Carrera Caribre6
฿93,047
Seller
World Wide Watch Shop
TH
Rolex Lady-Datejust "Zephyr" 26mm 750 Gold - Ref. 6700
Rolex Lady-Datejust "Zephyr" 26mm 750 Gold - Ref. 6700
฿91,751
Seller
Auktionskontor Hamburg
DE
Rolex Datejust
Rolex Datejust
฿308,401
Seller
Juwelier Rubin GbR
 
DE
Omega | A Limited Edition pink Gold Tonneau-form Automatic...
Auction
Omega | A Limited Edition pink Gold Tonneau-form Automatic...
฿191,439
Estimated price
Seller
Sotheby´s
 
Rolex Datejust
Rolex Datejust
฿232,583
Seller
chasovshik.ru
RU
Rolex Sea-Dweller
Rolex Sea-Dweller
฿503,369
Seller
CARR
UK
Omega 18K YG CONSTELLATION  168017
Omega 18K YG CONSTELLATION 168017
฿186,093
Seller
NOSTIME
KR
Bulgari DG42BSCVDCH
TOP
Bulgari DG42BSCVDCH
฿189,312
Seller
Deluxe ( Asia ) Ltd
12
HK
Omega De Ville Stainless Steel White Automatic 424.10.33.20.05...
TOP
Omega De Ville Stainless Steel White Automatic 424.10.33.20.05...
฿88,062
Seller
VIP WATCH & JEWELLERY
18
HK
Ball Engineer II Magneto S
Ball Engineer II Magneto S
฿109,662
Seller
World Wide Watch Shop
TH
TAG Heuer Grand Carrera
TAG Heuer Grand Carrera
฿201,852
Seller
Scrooge Counting House Ltd
 
DE
Omega 42420372002001
TOP
Omega 42420372002001
฿157,533
Seller
好百年鐘錶珠寶 Good Century Watches & Jewelry Co.Ltd
 
HK
Omega Seamaster Diver 300 M
Omega Seamaster Diver 300 M
฿99,169
Seller
Fabel GmbH
158
DE
Ulysse Nardin Maxi Marine Chronometer
Ulysse Nardin Maxi Marine Chronometer
฿222,614
Seller
chasovshik.ru
RU
Rolex Explorer Stainless Steel 36mm
Rolex Explorer Stainless Steel 36mm
฿154,524
Seller
Diamond Box, Inc. DBA Solitaire Bridal & Estate Jewellers
 
US
Corum ADMIRAL'S CUP CHRONOGRAPH 50MM LEFT HANDED PVD
Corum ADMIRAL'S CUP CHRONOGRAPH 50MM LEFT HANDED PVD
฿132,924
Seller
NOSTIME
KR
Corum 895-931-06-0371-AN92
TOP
Corum 895-931-06-0371-AN92
฿233,981
Seller
Deluxe ( Asia ) Ltd
12
HK
Omega Seamaster Professional  300m Automatic - 41 mm
Omega Seamaster Professional 300m Automatic - 41 mm
฿69,887
Seller
wagener-gold International e.K.
763
DE
Omega Speedmaster
Omega Speedmaster
฿111,656
Seller
World Wide Watch Shop
TH
Rolex Yaayhtmaster II 116681 Stahl Rosegold Yacht-Master Chrono
Rolex Yaayhtmaster II 116681 Stahl Rosegold Yacht-Master Chrono
฿596,967
Seller
Juwelier Rieger
110
DE
Rolex Date art. Rd380
Rolex Date art. Rd380
฿81,990
Seller
Stroppiana SRL
223
IT
Rolex Vintage UAE Air Force Pepsi Bezel GMT-Master B&P 1675
Rolex Vintage UAE Air Force Pepsi Bezel GMT-Master B&P 1675
฿4,176,426
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
85
UK
Rolex Daytona
Rolex Daytona
฿465,199
Seller
chasovshik.ru
RU
Rolex Explorer II 40mm Stainless Steel With Black Dial
Rolex Explorer II 40mm Stainless Steel With Black Dial
฿161,170
Seller
Diamond Box, Inc. DBA Solitaire Bridal & Estate Jewellers
 
US
Rolex Day-Date President Bracelet
Rolex Day-Date President Bracelet
฿359,196
Seller
Orologeria Duomo Milano
40
IT
Montblanc 102345
TOP
Montblanc 102345
฿293,540
Seller
Deluxe ( Asia ) Ltd
12
HK
Breitling Avenger Skyland Chronograph - A13380 - Box &...
Breitling Avenger Skyland Chronograph - A13380 - Box &...
฿93,313
Seller
wagener-gold International e.K.
763
DE
Omega Seamaster Diver 300 M
Omega Seamaster Diver 300 M
฿93,047
Seller
World Wide Watch Shop
TH
Rolex Daytona  Stahl " Paul Newman Panda" Einzelstück...
Rolex Daytona Stahl " Paul Newman Panda" Einzelstück...
฿928,247
Seller
C & F Handelskontor GmbH
 
DE
Rolex submariner art. Rb639
Rolex submariner art. Rb639
฿193,263
Seller
Stroppiana SRL
223
IT
Rolex Explorer I Stahl 114270 Automatik 1
Rolex Explorer I Stahl 114270 Automatik 1
฿151,877
Seller
Juwelier Rieger
110
DE
Rolex Yacht-Master II
Rolex Yacht-Master II
฿510,061
Seller
chasovshik.ru
RU
Rolex Datejust 36mm Stainless Steel With White Roman Numeral Dial
Rolex Datejust 36mm Stainless Steel With White Roman Numeral Dial
฿141,231
Seller
Diamond Box, Inc. DBA Solitaire Bridal & Estate Jewellers
 
US
Tudor : Heritage Black Bay Blue  :  79230B-0001 :  Stainless...
Tudor : Heritage Black Bay Blue : 79230B-0001 : Stainless...
฿71,779
Seller
BernardWatch.com
141
US
Hublot Big Bang Meca-10 King Gold
Hublot Big Bang Meca-10 King Gold
฿1,151,768
Free shipping
Seller
Istock LTD
30
LV
Omega Seamaster Professional  300m Quarz - 40 mm - Papers
Omega Seamaster Professional 300m Quarz - 40 mm - Papers
฿58,174
Seller
wagener-gold International e.K.
763
DE
Rolex - Submariner - 116610LN - Men - 2011-present
Auction
Rolex - Submariner - 116610LN - Men - 2011-present
฿292,822
Estimated price
Seller
Catawiki BV
 
Rolex Sea-Dweller Triple Six Tritium Mark III Stahl Automatik...
Rolex Sea-Dweller Triple Six Tritium Mark III Stahl Automatik...
฿351,348
Free shipping
Seller
Juwelier Ralf Häffner
385
DE
Rolex Explorer II scat/gar art. Re352
Rolex Explorer II scat/gar art. Re352
฿163,981
Seller
Stroppiana SRL
223
IT
Rolex Datejust 116234 Stahl Weissgold 750 Automatik 36mm Date...
Rolex Datejust 116234 Stahl Weissgold 750 Automatik 36mm Date...
฿190,920
Seller
Juwelier Rieger
110
DE
Rolex Datejust II
Rolex Datejust II
฿338,922
Seller
chasovshik.ru
RU
Rolex Datejust II 126334
Rolex Datejust II 126334
฿322,105
Seller
Mall of the Watch
411
MC
Omega Seamaster PloProf 224.32.55.21.01.001 Co-axial 1200m No...
Omega Seamaster PloProf 224.32.55.21.01.001 Co-axial 1200m No...
฿156,133
Seller
Dolce Time
 
IT
Rolex Sea-Dweller
Rolex Sea-Dweller
฿240,924
Seller
Sea Wave Diamonds
73
US
Omega Seamaster 300m Quartz - Midsize - 2561.80.00
Omega Seamaster 300m Quartz - Midsize - 2561.80.00
฿46,461
Seller
wagener-gold International e.K.
763
DE

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.