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Rolex Submariner Date 16610 Very good Steel 40mm Automatic
TOP
Rolex Submariner 16610 military NATO 1994 S series
Php 2,075,027
Verified Dealer
9
MC
Jaquet-Droz Astrale J015134222 New White gold 43mm Automatic
TOP
Jaquet-Droz "The Times Zones", unique piece - no. 1/1
Php 1,227,129
Verified Dealer
52
CH
Paul Picot Atelier 3340S-ET Paul Picot Regolatore Automatico con Riserva di Carica in Occhio di Tigre New Steel 40mm Automatic
TOP
Paul Picot Atelier Regulateur Power Reserve "Eye of the Tiger"...
Php 354,533
Free shipping
Verified Dealer
3426
IT
Omega Constellation 37461 Very good Steel 35mm Automatic
TOP
Omega Constellation Automatic Chronometer 18k Solid Gold Half...
Php 94,824
Free shipping
Verified Dealer
46
US
Omega Seamaster Diver 300 M 210.30.42.20.03.001 Good Steel 42mm Automatic The Philippines, 1630
Omega Seamaster Diver 300 M
Php 180,000
Private Seller
PH
Omega De Ville Prestige 424.20.37.20.02.001 Very good Gold/Steel 36.8mm Automatic The Philippines, PasigCity
Omega 4242037202002001
Php 184,946
Private Seller
PH
TAG Heuer Aquaracer 300M WAY201A.BA0927 Very good Steel 43mm Manual winding The Philippines, 5600
TAG Heuer Aquaracer 300M
Php 85,000
Private Seller
PH
Omega De Ville Prestige 424.20.37.20.02.001 Very good Gold/Steel 36.8mm Automatic The Philippines, PasigCity
Omega De Ville Prestige
Php 184,890
Private Seller
PH
Omega De Ville Trésor 432.53.40.21.02.002 Very good Rose gold 40mm Manual winding
TOP
Omega Deville Tresor 432.53.40.21.02.002
Php 337,765
Free shipping
Verified Dealer
1076
US
Tissot Ballade Powermatic 80 COSC T108.408.16.057.00 New Steel Automatic
TOP
Tissot Ballade Powermatic 80 COSC
Php 44,465
Verified Dealer
183
ES
Rolex Datejust 6824 Very good Yellow gold 30mm Automatic
TOP
Rolex Datejust 18k Gold in Prestige Condition +1 Original...
Php 219,301
Free shipping
Verified Dealer
717
NL
Sinn 103 103.0619 New Steel 41mm Automatic
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
Php 145,252
Verified Dealer
115
DE
Rolex Cellini Date 50519 Unworn White gold 39mm Automatic
Rolex Cellini Date 18K White Gold Automatic Mens Watch 50515...
Php 700,049
Free shipping
Verified Dealer
662
US
Omega De Ville Hour Vision 431.30.41.21.02.001 Good Steel 41mm Automatic
Omega デ・ヴィル アワービジョン コーアクシャル 431.30.41.21.02.001
Php 214,618
Free shipping
Verified Dealer
1329
JP
Omega Seamaster Planet Ocean 2201.50.00 Very good Steel 42mm Automatic
Omega Seamaster Planet Ocean 42mm
Php 174,895
Verified Dealer
133
DE
Hublot Classic Fusion Ultra-Thin 515.NX.1270.LR New Titanium 45mm Manual winding
TOP
Hublot Classic Fusion 45 ultra-thin
Php 439,047
Verified Dealer
52
CH
Rolex Datejust 126300 New Steel 41mm Automatic
Rolex Datejust 41
Php 453,542
Verified Dealer
275
DE
Certina DS Podium C034.451.16.057.00 New Steel 40mm Quartz
Certina C034.451.16.057.00 DS Podium Black Dial Chronometer...
Php 23,359
Verified Dealer
8
UK
Chopard Mille Miglia 168588-3001 Very good Steel 39mm Automatic
TOP
Chopard Classic Racing Mille Miglia Automatic White - 168588-3001
Php 160,014
Free shipping
Verified Dealer
717
NL
Rolex Submariner (No Date) 114060 Very good Steel 40mm Automatic
Rolex Submariner (No Date), 114060, LC100, Full Set
Php 592,272
Verified Dealer
48
DE
Rolex Lady-Datejust 79173 Very good Gold/Steel 26mm Automatic
Rolex Datejust Decorated MOP Dial Steel Yellow Gold Ladies...
Php 234,684
Free shipping
Verified Dealer
662
US
Omega Constellation Ladies 123.15.27.20.57.002 Unworn Steel 27mm Automatic
Omega コンステレーション コーアクシャル プリュム 123.15.27.20.57.002
Php 298,081
Free shipping
Verified Dealer
1329
JP
Breitling Bentley Motors A25362 Very good Steel 48mm Automatic
Breitling Bentley Motors
Php 257,896
Verified Dealer
11
NL
Rolex GMT-Master II 126710BLNR New Steel 40mm Automatic
Rolex GMT-Master II 126710BLNR Batman New May 2019
Php 1,156,086
Verified Dealer
9
MC
Montblanc Timewalker 104286 New Steel 43mm Automatic
Montblanc Timewalker Twinfly Chronograph Automatic 104286
Php 236,849
Verified Dealer
10
DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 Jubilee 126334 Rhodium Cannelée
Php 622,508
Verified Dealer
41
CH
Rolex Yacht-Master 169623 Good Gold/Steel 29mm Automatic
Rolex Yacht-Master
Php 296,432
Verified Dealer
28
DE
Breitling Navitimer 1 B01 Chronograph 43 AB0121211G1A1 Unworn Steel 43mm Automatic
Breitling Navitimer 01 AB0121211G1A1
Php 371,133
Verified Dealer
414
DE
B.R.M BT 12 CN AR New Titanium 46mm Automatic
B.R.M BT12-44-CN AR MODELE UNIQUE PRIX PROMO ETE 2020
Php 236,553
Free shipping
Verified Dealer
14
FR
Rolex Datejust 116203 Very good Steel 36mm Automatic
Rolex Datejust 36 Steel Yellow Gold White Dial Mens Watch 116203
Php 374,794
Free shipping
Verified Dealer
662
US
Omega Speedmaster Racing 329.23.44.51.06.001 Good Steel 44.2mm Automatic
Omega スピードマスター レーシング マスタークロノメーター 329.23.44.51.06.001
Php 372,005
Free shipping
Verified Dealer
1329
JP
Omega Seamaster Planet Ocean 232.32.46.21.01.003 Very good Steel 45.5mm Automatic
Omega Seamaster Planet Ocean XL
Php 216,396
Verified Dealer
11
NL
TAG Heuer Grand Carrera WAV5113.FC6231 Very good Steel 42.5mm Automatic
TAG Heuer Grand Carrera Date GMT Calibre 8
Php 114,719
Verified Dealer
716
LV
Rolex Submariner Date 116610LV New Steel 40mm Automatic
Rolex Submariner 116610LV Hulk new sticked
Php 978,227
Verified Dealer
9
MC
Rolex Submariner Date 116613LB Unworn Gold/Steel 40mm Automatic
Rolex Oyster Perpetual Submariner Date
Php 749,974
Verified Dealer
178
AT
Rolex GMT-Master 1675 Good Steel 40mm Automatic
Rolex GMT-Master
Php 886,333
Verified Dealer
28
DE
Panerai Special Editions Panerai PAM 508 Very good Ceramic 47mm Automatic
Panerai Submersible, PAM 00508, Limitierte Edition, 1000 St.
Php 995,420
Verified Dealer
48
DE
Certina DS Action C032.851.11.047.00 New Steel 41mm Quartz
Certina C032.851.11.047.00 DS Action Wristwatch
Php 25,197
Verified Dealer
8
UK
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41mm 126334 NEW 2020 Blue Jubilee
Php 575,451
Verified Dealer
332
US
Rolex Pearlmaster 81208 New Yellow gold 34mm Automatic
TOP
Rolex Datejust Pearlmaster 34
Php 1,209,512
Verified Dealer
52
CH
Omega Speedmaster Broad Arrow 321.53.42.50.01.001 Very good Rose gold 42mm Automatic
Omega Speedmaster Broad Arrow 1957 Co-Axial Chronograph
Php 607,686
Verified Dealer
11
NL
Rolex Submariner (No Date) 6538 Very good Steel 38mm Automatic
TOP
Rolex Submariner 6538 BIG CROWN 2-LINER 1956
Php 10,552,993
Verified Dealer
11
CH
Rolex GMT-Master II 116710BLNR New Steel 40mm Automatic
Rolex GMT-Master II 116710BLNR Batman Dec 2018 New
Php 978,227
Verified Dealer
9
MC
Breitling Superocean 42 A1736402/BA28 Good Steel 42mm Automatic
Breitling Superocean 42
Php 148,157
Verified Dealer
7
DE
Rolex Oyster Perpetual 6564 Good Steel 34mm Automatic
Rolex Oyster Perpetual
Php 174,895
Verified Dealer
28
DE
Rolex Day-Date 18248 Very good Yellow gold Automatic
Rolex Daydate 18248 pinball onyx diamond dial T Swiss full set
Php 1,304,302
Verified Dealer
220
IT
Breitling Superocean Steelfish A17390-308 Good Steel 44mm Automatic
Breitling Superocean Steelfish
Php 112,644
Verified Dealer
51
MT
Rolex Sea-Dweller 126600 New Steel 43mm Automatic
Rolex Sea-Dweller 126600 NEW 2020
Php 723,017
Verified Dealer
332
US
Breguet GJ24BB8548DDC3 New White gold Automatic
TOP
Breguet Secret de la Reine
Php 2,972,857
Verified Dealer
52
CH
Certina DS Action C032.251.11.041.00 New 34.5mm Quartz
Certina C032.251.11.041.00 DS Action Lady Wristwatch
Php 25,790
Verified Dealer
8
UK
Rolex Submariner (No Date) 6538 Very good Steel 38mm Automatic
TOP
Rolex Submariner 6538 BIG CROWN TROPICAL 1958
Php 8,753,413
Verified Dealer
11
CH
Rolex Sea-Dweller Deepsea 116660 D New Steel 44mm Automatic
Rolex Deep Sea 116660 D-Blue NOS
Php 883,369
Verified Dealer
9
MC
Rolex Sea-Dweller 126600 Unworn Steel 43mm Automatic
Rolex Sea-Dweller RED 126600 2019
Php 758,867
Verified Dealer
41
CH
A. Lange & Söhne Little Lange 1 111.021 Very good Yellow gold 36mm Manual winding
A. Lange & Söhne Glashütte I/SA Lange 1 "The Little One"
Php 1,096,800
Verified Dealer
28
DE
Rolex Pearlmaster 81158 Very good Yellow gold 34mm Automatic
Rolex Pearlmaster
Php 2,187,671
Verified Dealer
49
DE
Omega Speedmaster Professional Moonwatch 311.92.44.30.01.001 New Ceramic 44.25mm Manual winding
Omega Speedmaster "Dark Side of the Moon" Apollo 8
Php 545,436
Verified Dealer
16
BE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41mm New Card 2020 Wimbledon
Php 575,451
Verified Dealer
332
US
Hublot Classic Fusion Ultra-Thin 545.OX.2210.LR New Rose gold 45mm Manual winding
TOP
Hublot Classic Fusion 42 ultra-thin
Php 897,362
Verified Dealer
52
CH
Ball Trainmaster NM3280D-S1CJ-BK New
Ball NM3280D-S1CJ-BK Trainmaster Manufacture 80 Hours Wristwat...
Php 161,378
Verified Dealer
8
UK
Rolex GMT-Master 1675 Very good Steel 40mm Automatic
TOP
Rolex GMT-Master 1675 PCG 1963
Php 1,554,492
Verified Dealer
11
CH
Rolex GMT-Master II 16710 Very good Steel 40mm Automatic
Rolex GMT-Master II 16710 Coke U Series 1997 Tritium
Php 764,796
Verified Dealer
9
MC
Rolex Sea-Dweller 126600 New Steel 43mm Automatic
Rolex Sea-Dweller RED 126600 NEW 2020
Php 788,510
Verified Dealer
CH
Breitling Aerospace EVO E7936310/BC27 Good Titanium 43mm Quartz
Breitling Aerospace EVO
Php 162,628
Free shipping
Verified Dealer
14
US

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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