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Rolex Day-Date 36 118138 New Yellow gold 36mm Automatic
TOP
Rolex 118138 Day-Date 36
฿615,803
Verified Dealer
19
HK
Ball Engineer Hydrocarbon DG2018C-S3C-BE New Steel 42mm Automatic
TOP
Ball Engineer Hydrocarbon AeroGMT II
฿112,276
Verified Dealer
44
NL
Omega De Ville Prestige 424.10.33.20.05.001 New Steel 32.7mm Automatic
TOP
Omega 424.10.33.20.05.001 De Ville Prestige
฿89,334
Verified Dealer
19
HK
Omega Constellation Double Eagle 121.32.44.52.01.001 New Steel 44mm Automatic
TOP
Omega Constellation Double Eagle Day-Date Chrono (SPECIAL OFFER)
฿182,923
Verified Dealer
1427
ES
Rolex Datejust 178288 New Yellow gold 31mm Automatic
TOP
Rolex Datejust 31, new, official retail price: 39.600 CHF
฿936,944
Verified Dealer
36
CH
Rolex Submariner (No Date) 5513 Good Steel 40mm Automatic
Rolex Submariner Non Date Tropical Dial Stainless Steel 5513 -...
฿1,105,666
Verified Dealer
293
UK
Zenith El Primero 65.0520.4026 Very good White gold 44mm Automatic
TOP
Zenith Grande Class Grande Date Rattrapante, Split Second,...
฿436,314
Verified Dealer
21
CH
Glycine Combat 3945.004 Unworn Steel 43mm Automatic Thailand, Rawai
Glycine Combat Chrono 3945.15AT
฿40,735
Private Seller
TH
Omega Seamaster Planet Ocean 232.30.38.20.01.001 Very good Steel Automatic Thailand, Bangkok
Omega Seamaster Planet Ocean Automatic Co-Axial 8520
฿105,598
Verified Dealer
TH
Rolex Day-Date Oysterquartz 19018 Very good Yellow gold 36mm Quartz
Rolex Day-Date Oysterquartz 18kt Gelbgold Quarz Armband...
฿414,522
Verified Dealer
DE
Omega Seamaster Aqua Terra 231.20.39.21.06.003 Good Steel 37mm Automatic
Omega シーマスター アクアテラ コーアクシャル 231.20.39.21.06.003
฿94,341
Free shipping
Verified Dealer
469
JP
Breitling Bentley Flying B R4436512/B874 Very good Rose gold 38mm Automatic
TOP
Breitling 18 K. Bentley Flying B Jumbo Chrono. Full set
฿411,102
Verified Dealer
277
NL
Rolex Submariner Date 116610LV New Steel 40mm Automatic
Rolex 116610LV
฿501,322
Verified Dealer
 
US
Breguet Classique 5140BA/29/9W6 New Yellow gold 40mm Automatic
TOP
Breguet Classique 40, new, official retail price: 18.300 CHF
฿386,219
Verified Dealer
36
CH
Ball Engineer II Magneto S NM3022C Very good Steel 42mm Automatic Thailand, Bangkok
Ball Engineer II Magneto S
฿103,404
Verified Dealer
TH
Omega Seamaster Aqua Terra 220.10.38.20.01.001 New Steel Automatic
Omega Seamaster Aqua Terra Co-Axial Master Stainless Steel...
฿137,872
Verified Dealer
197
US
Sinn 103 103.0619 New Steel 41mm Automatic
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
฿84,639
Verified Dealer
75
DE
Rolex Sea-Dweller 126600 Unworn 43mm Automatic
Rolex Pro Hunter - Sea Dweller Red
฿842,475
Verified Dealer
117
SE
Rolex Lady-Datejust 178343 Unworn Gold/Steel 31mm Automatic
Rolex Datejust Medium 31mm Stahl/Gelbgold Oyster Armband...
฿338,174
Verified Dealer
1273
DE
Rolex Sea-Dweller 126600 New Steel 43mm Automatic
Rolex Sea-Dweller 50th Year Anniversary 126600
฿433,984
Free shipping
Verified Dealer
7
US
Omega Speedmaster Professional Moonwatch 310.20.42.50.01.001 New Steel 42mm Manual winding
Omega Speedmaster Moonwatch Apollo 11 50th Anniversary NEW 2019
฿444,957
Free shipping
Verified Dealer
104
IT
Rolex Air King 114234 Very good Steel 34mm Automatic
Rolex 114234
฿156,642
Verified Dealer
 
US
Breguet GJ24BB8548DDC3 New White gold Automatic
TOP
Breguet Secret de la Reine, new, official retail price: 90.000...
฿1,614,362
Verified Dealer
36
CH
Oris 634.7637.74.54MB Unworn Steel 47mm Automatic Thailand, Bangkok
Oris Diver 1000m automatic
฿53,269
Verified Dealer
TH
Omega Seamaster Planet Ocean Chronograph 215.30.46.51.01.001 Unworn Steel 45.5mm Automatic
Omega Seamaster Planet Ocean Chronograph
฿183,096
Verified Dealer
121
CZ
Rolex Oyster Perpetual 31 177200 Pink Very good Steel 31mm Automatic
Rolex Oyster Perpetual Lady Medium Mid Size Automatic Damenuhr
฿137,840
Verified Dealer
461
DE
Omega Seamaster Diver 300 M 21230412003001 Very good Steel 41mm Automatic
Omega - Seamaster 300
฿114,289
Verified Dealer
117
SE
Rolex Day-Date 36 118239 Unworn White gold 36mm Automatic
Rolex Day Date Weißgold Armband Präsident 36mm Ref. 118239 UVP...
฿918,761
Verified Dealer
1273
DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41mm 126334 Stainless Steel Jubilee Blue Roman
฿318,046
Free shipping
Verified Dealer
7
US
Omega Seamaster 168.0061 Good Steel 35mm Automatic
Omega Seamaster Chronometer, Automatik, ca. 1973
฿50,092
Verified Dealer
208
DE
Audemars Piguet Royal Oak Concept 26589IO.OO.D002CA.01 Unworn Titanium 44mm Manual winding
Audemars Piguet Royal Oak Concept Tourbillon GMT 44 Titanium...
฿6,043,889
Verified Dealer
694
NL
Hublot Classic Fusion Ultra-Thin 545.OX.2210.LR New Rose gold 45mm Manual winding
TOP
Hublot Classic Fusion Ultra-Thin, official retail price:...
฿515,497
Verified Dealer
36
CH
Omega Seamaster Planet Ocean Chronograph 232.30.46.51.01.001 Unworn Steel 46mm Automatic Thailand, Bangkok
Omega seamaster 600m co-axial
฿90,870
Verified Dealer
TH
Omega Speedmaster Professional Moonwatch 311.33.42.50.01.001 Very good Steel 42mm Manual winding
Omega Speedmaster 50 Anniversario
฿304,008
Free shipping
Verified Dealer
104
IT
Rolex Submariner (No Date) 5513 Very good Steel 40mm Automatic
Rolex Vintage 1971 Rolex Submariner 5513 Star Dust SPIDER...
฿313,158
Free shipping
Verified Dealer
259
US
Omega Seamaster Planet Ocean 215.92.46.22.03.001 Very good Ceramic 45.5mm Automatic
Omega - Seamaster Planet Ocean
฿225,313
Verified Dealer
117
SE
Omega Speedmaster 310.20.42.50.01.001 New Steel 42mm Manual winding
Omega Speedmaster Apollo 11 50th Anniversary 310.20.42.50.01
฿413,617
Verified Dealer
226
US
Omega Speedmaster Professional Moonwatch 310.20.42.50.01.001 Very good Steel 42mm Manual winding
Omega Speedmaster Professional Moonwatch
฿352,514
Free shipping
Verified Dealer
177
US
Omega Seamaster 168.024 Very good Steel 35mm Automatic
Omega Seamaster Chronometer, Automatik, ca. 1968
฿54,929
Verified Dealer
208
DE
Rolex Sky-Dweller 326935 Very good Rose gold 42mm Automatic
Rolex Sky-Dweller Sundust rose gold from 2016 with box + papers
฿1,345,582
Verified Dealer
694
NL
Rolex Pearlmaster 81208 New Yellow gold 34mm Automatic
TOP
Rolex Pearlmaster 34, new, official retail price: 33.800 CHF
฿694,709
Verified Dealer
36
CH
Omega Seamaster Diver 300 M 22258000 Very good Steel 44mm Automatic Thailand, Bangkok
Omega Seamaster 300 diver
฿108,104
Verified Dealer
TH
Rolex Submariner (No Date) 114060 Very good Steel 40mm Automatic
Rolex Submariner Non-Date Black Ceramic 114060
฿317,379
Free shipping
Verified Dealer
41
UK
Rolex Datejust 126334 Unworn Steel 41mm Automatic
Rolex Datejust 41 Blue Index Dial Oyster Bracelet [Unworn]
฿328,856
Free shipping
Verified Dealer
85
US
Omega Seamaster Planet Ocean 215.30.40.20.04.001 Very good Steel 39.5mm Automatic
Omega - Seamaster Planet Ocean Co‑Axial Master Chronometer
฿128,984
Verified Dealer
117
SE
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Datejust 41 | Blue Dial Jubilee
฿343,998
Verified Dealer
 
UK
Rolex Yacht-Master II 116688 Unworn Yellow gold 44mm Automatic
Rolex Yacht-Master II 116688
฿1,267,468
Free shipping
Verified Dealer
475
UK
Rolex Sea-Dweller 126600 Very good Steel 43mm Automatic
Rolex Sea-Dweller Anniversary 126600
฿438,684
Verified Dealer
 
US
Rolex Daytona 116523 Very good Gold/Steel 40mm Automatic
Rolex Cosmograph Daytona steel / gold black diamond dial
฿464,649
Verified Dealer
694
NL
Hublot Classic Fusion Ultra-Thin 545.OX.0180.LR New Rose gold 42mm Manual winding
TOP
Hublot Classic Fusion Ultra-Thin, official retail price:...
฿541,353
Verified Dealer
36
CH
Rolex Sea-Dweller Very good Steel 40mm Automatic Thailand, Bangkok
Rolex Sea-Dweller
฿338,414
Verified Dealer
TH
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Datejust
฿319,613
Free shipping
Verified Dealer
177
US
Rolex Oyster Perpetual Date 15200 Very good Steel 34mm Automatic
Rolex Oyster Perpetual Date 15200 34mm Black Dial
฿145,380
Free shipping
Verified Dealer
41
UK
Omega De Ville Hour Vision 433.33.41.21.03.001 Very good Steel 41mm Automatic
Omega - De Ville Hour Vision Co-Axial Master Chronometer
฿117,555
Verified Dealer
117
SE
Rolex Datejust II 126334 Very good Gold/Steel 41mm Automatic
Rolex Datejust II 41mm BLUE Dial 126334 Oyster Band
฿297,679
Verified Dealer
32
US
Rolex Explorer II 16550 Very good Steel 40mm Automatic
Rolex Explorer II 16550
฿325,569
Free shipping
Verified Dealer
475
UK
Rolex Submariner Date 116610LV Good Steel 40,00mm Automatic
Rolex Submariner Date Ref. 116610LV
฿535,814
Free shipping
Verified Dealer
5
DE
Rolex Day-Date 36 18346 ( not 118206 or 18206) Good Platinum 36mm Automatic
Rolex Day-Date platinum diamond from 1995 with silver diamond...
฿741,020
Verified Dealer
694
NL
Breguet Reine de Naples 8918BA.58864D00D New Yellow gold 36.5mm Automatic
TOP
Breguet Reine de Naples, new, official retail price: 33.000 CHF
฿746,582
Verified Dealer
36
CH
Panerai Radiomir Rattrapante PAM00214 Very good Steel Automatic Thailand, Bangkok
Panerai Radiomir Rattrapante
฿244,410
Verified Dealer
TH
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Datejust
฿380,715
Free shipping
Verified Dealer
177
US
Rolex Lady-Datejust 178273 Good Gold/Steel 31mm Automatic
Rolex Lady-Datejust 31mm 178273 Diamond Dot Dial
฿300,998
Free shipping
Verified Dealer
41
UK
Rolex Datejust 126334 Unworn Gold/Steel 41mm Automatic
Rolex - Datejust 41
฿365,726
Verified Dealer
117
SE
Rolex GMT-Master II 126710BLNR New Steel 40mm Automatic
Rolex GMT-Master II 126710 BLNR NEW
฿514,741
Verified Dealer
NL
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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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