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Rolex GMT-Master II 16710 Good Steel 40mm Automatic
TOP
Rolex GMT-Master II Coke Bezel Steel 40MM "P Series"
฿393,092
Verified Dealer
624
JP
Rolex Submariner Date 116610LV Unworn Steel 40mm Automatic
TOP
Rolex Submariner Green Dial Ceramic Bezel "Hulk" 300M Steel...
฿690,888
Verified Dealer
624
JP
Rolex Oyster Perpetual 124300 Very good Steel 41mm Automatic
TOP
Rolex Oyster Perpetual Black Dial Stainless Steel 41MM "Random...
฿226,326
Verified Dealer
624
JP
Breitling Navitimer AB01212B1C1A1 Unworn Steel 43mm Automatic
TOP
Breitling Navitimer 1 B01 Chronograph Pan Am Limited Edition...
฿201,013
Verified Dealer
624
JP
Omega Constellation Double Eagle 121.92.41.50.01.001 Very good Titanium 41mm Automatic
TOP
Omega Constellation Double Eagle MISSION HILLS Titanium
฿144,572
Free shipping
Verified Dealer
131
UK
Rolex GMT-Master 1675 Very good Steel Automatic Thailand, BKK/Pattaya
TOP
Rolex GMT-Master 1675 PCG TROPICAL UNPOLISHED 1959
฿3,700,000
Free shipping
Verified Dealer
11
CH
Rolex Day-Date 36 18206 Very good Platinum 36mm Automatic
TOP
Rolex Day-Date Meteorite Diamond Dial Full Set 1999 Platinum...
฿1,465,280
Verified Dealer
176
DE
Omega Constellation 468.1201 Unworn Yellow gold 36mm Automatic
TOP
Omega Constellation Chronometer
฿370,888
Verified Dealer
107
CH
Seiko King Very good Steel 36mm Automatic Thailand, Muang District
Seiko King 5246-6000 Chronometer Hi-Beat Beautiful Condition
฿32,000
Private Seller
TH
Omega De Ville Co-Axial 168.1704 Very good Steel 39mm Automatic
Omega De Ville Chronometer Co-Axial Automatik Edelstahl...
฿101,115

Sold by Chrono24

DE
Mido Multifort M005.431.11.441.00 Good Steel 42mm Automatic Thailand, Muang Nonthaburi
Mido Multifort
฿16,800
Private Seller
TH
Omega Constellation 168.0056 Good Steel 34.8mm Automatic Thailand, Muang District
Omega Constellation
฿45,000
Private Seller
TH
Bremont V4/RR Very good Steel 43mm Automatic Thailand, Banglamung
Bremont Norton
฿185,220
Private Seller
TH
Rolex Yacht-Master 169623 Very good Gold/Steel 29mm Automatic
TOP
Rolex Yacht-Master Lady's Boating 18K Sand-blasted bezel -...
฿160,166
Free shipping
Verified Dealer
797
NL
Mido Commander M031.631.33.061.00 New Steel 42,5mm Automatic
TOP
Mido Commander Icône
฿30,624
Verified Dealer
13
CH
Rolex Datejust II 116300 Unworn Steel 41mm Automatic
TOP
Rolex Datejust II 41 Iced Out Baguette Lünette Bezel Diamond...
฿771,339
Verified Dealer
176
DE
Omega De Ville Prestige 424.50.37.20.08.001 Unworn Yellow gold 36.8mm Automatic
TOP
Omega De Ville Prestige Co-Axial
฿481,673
Verified Dealer
7632
DE
Sinn 103 103.0619 New Steel 41mm Automatic
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
฿90,084
Verified Dealer
144
DE
Omega Seamaster Planet Ocean 232.92.46.21.03.001 Very good Titanium 45.5mm Automatic
Omega Seamaster Planet Ocean Automatik Titan Ref. 232.92.46.21...
฿182,006

Sold by Chrono24

DE
Omega Constellation Manhattan Very good Steel 35mm Automatic
TOP
Omega Constellation Manhattan Vintage 1985 Auto Chronometer...
฿58,547
Verified Dealer
52
US
Omega Seamaster Planet Ocean Chronograph 232.63.46.51.01.001 Very good Rose gold 45.5mm Automatic
Omega Seamaster Planet Ocean Chronograph Rose Gold Black...
฿513,177
Verified Dealer
20
US
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 | NEU | 2020 | FullSet
฿437,551
Verified Dealer
127
DE
Breitling Chronomat 44 AB011010/BB08 Very good Steel 44mm Automatic
TOP
Breitling Chronomat 44 Flying Fish AB011010.BB08
฿154,246
Free shipping
Verified Dealer
797
NL
Rolex Sky-Dweller 326934 Unworn Steel 42mm Automatic
Rolex Sky-Dweller "Blue-Dial", Ref. 326934-0003.
฿878,778
Verified Dealer
31
DE
Omega Seamaster Planet Ocean Chronograph 232.92.46.51.03.001 Very good Titanium 45.5mm Automatic
Omega Seamaster Planet Ocean
฿200,822
Verified Dealer
20
US
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41mm 126334 2020 BLUE INDEX STICKERS
฿352,180
Verified Dealer
367
US
Rolex Datejust 126334 Unworn Steel 41mm Automatic
Rolex Datejust 41 Ref.126334 2020 dark rhodium, Eu, unworn,...
฿422,475
Verified Dealer
55
DE
Rolex Sea-Dweller 16600T Very good Steel 40mm Automatic
Rolex Sea-Dweller Automatik Stahl Herrenuhr Oyster Perpetual...
฿314,375

Sold by Chrono24

DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 Jubilee 126334 Rhodium Cannelée
฿393,428
Verified Dealer
71
CH
Breitling Superocean II 42 A17365D1/C915-148S Very good Steel 42mm Automatic
Breitling Superocean II 42 Blue Dial Diver Chronometer
฿77,147
Verified Dealer
20
US
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date 126610LN | NEU | 2020 | FullSet
฿547,858
Verified Dealer
127
DE
Rolex Lady-Datejust 6917 Very good Yellow gold 26mm Automatic
TOP
Rolex Lady-Datejust President 18K Yellow Gold Black Diamond...
฿209,510
Free shipping
Verified Dealer
797
NL
Rolex Submariner (No Date) 114060 Very good Silver 40mm Automatic
Rolex Submariner No Date, Ref. 114060-0002
฿404,091
Verified Dealer
31
DE
Tudor North Flag 91210N-0001 Very good Steel 40mm Automatic
Tudor North Flag 91210N Full Set
฿103,623
Verified Dealer
 
HK
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41mm 2020 Blue Dial 126334
฿336,732
Verified Dealer
367
US
Rolex Submariner (No Date) 124060 Unworn Steel 41mm Automatic
Rolex Submariner Ref.124060 2020/10, 41, Eu, unworn, Box&Papers
฿451,891
Verified Dealer
55
DE
Breitling Navitimer World A24322 Very good Steel 46mm Automatic
Breitling Navitimer World 46 GMT Chronograph Automatik...
฿167,299

Sold by Chrono24

DE
Rolex Sea-Dweller 126600 Unworn Steel 43mm Automatic
Rolex Sea-Dweller RED 126600 NEW 2019
฿485,350
Verified Dealer
71
CH
Ulysse Nardin Maxi Marine Diver 8006-102-3a/91 Very good Rose gold 42.7mm Automatic
Ulysse Nardin Maxi Marine Diver Chronograph Rose Gold 43mm
฿439,707
Verified Dealer
20
US
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 | LC100 | NEU | 2020 | Wimbledon
฿422,843
Verified Dealer
127
DE
Chopard Mille Miglia 158459 Very good Steel 44mm Automatic
TOP
Chopard GT XL Mille Miglia Gran Turismo Automatic Chronograph...
฿161,747
Free shipping
Verified Dealer
797
NL
Rolex Submariner Date 116613LB Unworn Gold/Steel 40mm Automatic
Rolex Submariner Date "Bluesy", Ref. Ref. 116613LB.
฿569,551
Verified Dealer
31
DE
Sinn 500.010 New Titanium 42mm Automatic
TOP
Sinn R500 Der Rennstopper aus hochfestem Titan
฿145,237
Verified Dealer
144
DE
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date 41mm 126610LN 2020
฿446,412
Verified Dealer
367
US
Rolex Submariner Date 126610LN Unworn Steel 41mm Automatic
Rolex Submariner Date Ref.126610LN 41mm, Eu, 2020, unworn, B&P
฿514,398
Verified Dealer
55
DE
Omega Seamaster Aqua Terra 231.10.39.21.55.002 Very good Steel 38.5mm Automatic
Omega Seamaster Aqua Terra 150M Diamanten Ref. 231.10.39.21.55...
฿167,299

Sold by Chrono24

DE
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Datejust 41 Steel Silver Index Dial 41MM Watch 126334
฿373,807
Free shipping
Verified Dealer
306
US
Ulysse Nardin Maxi Marine Diver 266-58-3 Good Yellow gold 40mm Automatic
Ulysse Nardin Maxi Marine Diver Chronometer 40mm Gold White Dial
฿324,312
Verified Dealer
20
US
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 | NEU | 2020 | FullSet
฿474,320
Verified Dealer
127
DE
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date 41mm NEW Model 126610LN
฿500,058
Verified Dealer
71
CH
Rolex Datejust 126300-0017 New Steel 41mm Automatic
Rolex Datejust 41, Ref. 126300-0017 "Azurro Blue". VERKLEBT
฿327,244
Verified Dealer
31
DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 Zifferblatt Wimbledon Jubile Armband
฿422,806
Free shipping
Verified Dealer
65
DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41mm 2020 126334
฿337,381
Verified Dealer
367
US
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 126334 Rhodium Jubilee 2020 New
฿422,843
Verified Dealer
6
NL
Omega Seamaster Planet Ocean 215.30.44.21.03.001 Very good Steel 43.5mm Automatic
Omega Seamaster Planet Ocean Automatik Stahl Ref. 215.30.44.21...
฿170,976

Sold by Chrono24

DE
Breitling Navitimer Heritage A13324121G1X1 Unworn Steel 41mm Automatic
Breitling Navitimer Chronograph 41 Stainless Steel 41mm A13324
฿153,861
Verified Dealer
33
US
Omega Seamaster Aqua Terra 220.10.41.21.02.001 Unworn Steel 41mm Automatic
Omega Seamaster Aqua Terra Golf Co-axial Master Chronometer...
฿134,056
Verified Dealer
20
US
Rolex Datejust 126334 Unworn Steel 41mm Automatic
Rolex Datejust 41 | LC100 | Neu | 2020 | FullSet
฿404,459
Verified Dealer
127
DE
Omega Seamaster Aqua Terra 220.10.41.21.03.004 New Steel 41mm Automatic
Omega Seamaster Aqua Terra 150m Co-Axial Master Chronometer
฿165,424
Verified Dealer
373
DE
Omega Seamaster Aqua Terra 220.12.41.21.02.003 New Steel 41mm Automatic
Omega Seamaster Aqua Terra Golf Edition
฿165,460
Verified Dealer
31
DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 Lünette Weißgold ZB schwarz
฿398,943
Free shipping
Verified Dealer
65
DE
Rolex Datejust 126334 New White gold 41mm Automatic
Rolex Datejust 41MM BLACK DIAMOND DIAL 2020
฿386,165
Verified Dealer
367
US
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date 126610LN 2020 New Model
฿490,866
Verified Dealer
6
NL
Omega Speedmaster '57 331.10.42.51.01.001 Very good Steel 41.5mm Automatic
Omega Speedmaster '57 Chronograph Automatik Ref. 331.10.42.51....
฿193,037

Sold by Chrono24

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.


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