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Rolex Sky-Dweller Gelbgold / Krokoleder 326138
฿969,017
Verified Dealer
468
DE
TOP
Eberhard & Co. Tazio Nuvolari 31030-MI Gravè Gold
฿411,057
Verified Dealer
 
IT
TOP
Tudor Heritage Black Bay Chrono Steel Gold Lederband 79363N-0002
฿174,512
Verified Dealer
468
DE
TOP
Louis Moinet Mechnograph Steel Blue Limited 12 pieces
฿253,737
Verified Dealer
AE
Glycine Combat Chrono 3945.15AT
฿49,510
Private Seller
TH
TOP
Omega Seamaster Planet Ocean gmt master chronometer
฿155,000
Private Seller
TH
Ball Engineer II Magneto S
฿102,114
Verified Dealer
TH
TOP
Rolex Lady-Datejust Pearlmaster 29, closing sale, o.p. 78.400 CHF
฿1,492,304
Verified Dealer
29
CH
TOP
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฿411,947
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15
CH
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Sinn 103 St Sa RB Classic Watch Sondermodell
฿83,507
Verified Dealer
67
DE
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Casio Gravitymaster GWR-B1000X-1AER LIm-Edition
฿31,528
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119
ES
Breitling Superocean Héritage II 42
฿117,591
Verified Dealer
32
DE
Rolex Cosmograph Daytona Black Dial Stainless Steel Ref. 116520
Price on request
Verified Dealer
6
US
Ulysse Nardin Maxi Marine Chronometer
฿600,305
Verified Dealer
7
US
Rolex Ladies Datejust Silver Diamond, Bezel & Lugs 18k Yellow...
฿108,148
Free shipping
Verified Dealer
 
US
Panerai Radiomir Rattrapante
฿241,360
Verified Dealer
TH
TOP
Hublot Classic Fusion Ultra-Thin 42, closing sale - o.p....
฿233,146
Verified Dealer
29
CH
Rolex Sea-Dweller Triple Six 16660
฿622,039
Verified Dealer
1245
NL
Rolex Submariner Date Ref. 116613LB
฿431,167
Free shipping
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DE
TAG Heuer WAR5010.BA0723 Steel Carrera
฿88,808
Verified Dealer
7
US
Breitling Navitimer 8
฿124,408
Verified Dealer
32
DE
Rolex Submariner Stainless Steel Ref. 5512 Black Matte 4-Line...
Price on request
Verified Dealer
6
US
Rolex 1988 Rolex Day-Date President 18238 36mm Double Quickset...
฿340,162
Free shipping
Verified Dealer
229
US
Rolex Ladies Rolex Datejust 18k White Gold Diamond Sapphire &...
฿92,521
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Omega Costellation
฿129,963
Verified Dealer
TH
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Rolex Datejust Pearlmaster 34, new, closing sale - o.p. 32.200...
฿621,775
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29
CH
Rolex Submariner Date 116619LB
฿843,966
Free shipping
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441
UK
Rolex Datejust 36mm Jubilee blue Index Ref. 126234
฿288,012
Free shipping
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DE
Rolex Daytona 16523 steel and gold dark grey with Rolex service
฿434,575
Verified Dealer
24
BE
Breitling Navitimer 8
฿182,351
Verified Dealer
32
DE
Panerai Luminor 1950 "Fiddy" Limited Edition Stainless Steel...
Price on request
Verified Dealer
6
US
Panerai Luminor Submersible 1950 Carbotech, 3 Days PAM 616
฿459,797
Verified Dealer
40
DE
Rolex Mens Datejust Quickset Rolex 18k White Gold Bezel &...
฿101,495
Free shipping
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Oris Diver 1000m automatic
฿52,604
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TH
TOP
Rolex Lady-Datejust, new, closing sale - official price 32.000...
฿621,775
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29
CH
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฿317,481
Free shipping
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22
US
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฿325,846
Free shipping
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DE
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฿893,611
Free shipping
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441
UK
Breitling Transocean Chrono Unitime
฿204,472
Verified Dealer
32
DE
Rolex Cosmograph Daytona Zenith Two Tone Ref. 16523
Price on request
Verified Dealer
6
US
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฿358,636
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22
US
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฿92,831
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฿106,755
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TH
TOP
Rolex Datejust 36, new, closing sale - official price 28.400 CHF
฿559,595
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29
CH
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฿305,055
Verified Dealer
1245
NL
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฿347,319
Free shipping
Verified Dealer
 
DE
Rolex Day-Date 18238
฿536,167
Free shipping
Verified Dealer
441
UK
Rolex Submariner Date, 116610LN, Full Set, 2015, LC100
฿337,094
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40
DE
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฿317,481
Free shipping
Verified Dealer
22
US
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฿306,341
Verified Dealer
376
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Omega Seamaster 300 Spectre Limited Edition 233.32.41.21.01.001
฿240,949
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JP
Omega seamaster 600m co-axial
฿89,736
Verified Dealer
TH
TOP
Hublot Classic Fusion Ultra-Thin 45, closing sale - o.p....
฿233,146
Verified Dealer
29
CH
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฿143,154
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NL
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฿399,468
Free shipping
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DE
Rolex Daytona 16518
฿554,039
Free shipping
Verified Dealer
441
UK
Rolex Sea-Dweller, Y-Serie, 16600, Full Set, Flat Four, LC 100
฿510,924
Verified Dealer
40
DE
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฿296,223
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US
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฿439,367
Free shipping
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฿113,388
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฿86,642
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TOP
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฿373,053
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29
CH
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฿182,351
Verified Dealer
1245
NL
Rolex Datejust Jubilee blue diamond Ref. 126234
฿335,049
Free shipping
Verified Dealer
 
DE
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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.