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Rolex GMT-Master II 16710T Very good Steel 40mm Automatic
TOP
Rolex GMT-Master II Rectangular Dial Caliber 3186
Price on request
Free shipping
Verified Dealer
131
ES
Rolex Submariner Date 116610LV Unworn Steel 40mm Automatic
TOP
Rolex Submariner Green Dial Ceramic Bezel "Hulk" 300M Steel...
Php 1,092,910
Verified Dealer
627
JP
Omega Constellation Manhattan Very good Steel 35mm Automatic
TOP
Omega Constellation Manhattan Vintage 1985 Auto Chronometer...
Php 93,021
Verified Dealer
52
US
Rolex GMT-Master II 16710 Good Steel 40mm Automatic
TOP
Rolex GMT-Master II Coke Bezel Steel 40MM "P Series"
Php 621,828
Verified Dealer
627
JP
Omega Seamaster Diver 300 M 210.30.42.20.03.001 Good Steel 42mm Automatic The Philippines, 1630
Omega Seamaster Diver 300 M
Php 170,000
Private Seller
PH
Rolex Sea-Dweller 16600T Very good Steel 40mm Automatic
Rolex Sea-Dweller Automatik Stahl Herrenuhr Oyster Perpetual...
Php 500,367

Sold by Chrono24

DE
Rolex Bubble Back 6085 Bubbleback WAFFLE Very good Yellow gold 34mm Automatic
TOP
Rolex OYSTER PERPETUAL CHRONOMETER 18K GOLD HONEYCOMB WABENBLATT
Php 467,595
Verified Dealer
606
DE
Breitling Chronomat 44 AB011010/BB08 Very good Steel 44mm Automatic
TOP
Breitling Chronomat 44 Flying Fish AB011010.BB08
Php 233,797
Free shipping
Verified Dealer
806
NL
Dubey & Schaldenbrand Dubey & Schaldenbrand Very good Steel 38mm Automatic The Philippines, 1550
Dubey & Schaldenbrand aerodyn gran chrono
Php 110,000
Private Seller
PH
Tissot Ballade Powermatic 80 COSC T108.408.16.057.00 New Steel Automatic
TOP
Tissot Ballade Powermatic 80 COSC
Php 43,892
Verified Dealer
208
ES
Sinn 103 103.0619 New Steel 41mm Automatic
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
Php 143,380
Verified Dealer
145
DE
Tudor Black Bay Fifty-Eight M79030B New Steel 39mm Automatic
TOP
Tudor Black Bay Fifty-eight Navy Blue Bracelet (NEW)
Php 219,459
Free shipping
Verified Dealer
546
LV
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
Breitling Super Avenger A1337011/A562 Very good Steel 48.4mm Automatic The Philippines, pangasinan
Breitling Super Avenger
Php 156,711
Private Seller
PH
Omega Constellation 358.1201 Very good Gold/Steel 35.5mm Automatic
Omega Constellation Chronometer Stahl / Gold Automatik...
Php 131,676

Sold by Chrono24

DE
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
Chopard Mille Miglia 158459 Very good Steel 44mm Automatic
TOP
Chopard GT XL Mille Miglia Gran Turismo Automatic Chronograph...
Php 274,763
Free shipping
Verified Dealer
806
NL
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust Ref.: 126334 von 10/2020 / EU 16% Mwst....
Php 696,418
Verified Dealer
174
DE
Rolex Submariner Date 16610 Very good Steel 40mm Automatic
Rolex Submariner 16610 military NATO 1994 S series
Php 2,048,288
Verified Dealer
10
MC
Sinn 500.010 New Titanium 42mm Automatic
TOP
Sinn R500 Der Rennstopper aus hochfestem Titan
Php 231,164
Verified Dealer
145
DE
Rolex Lady-Datejust Pearlmaster 80285 New Rose gold 29mm Automatic
TOP
Rolex Lady-Datejust Pearlmaster, 260 diamonds on bezel and...
Php 3,118,029
Verified Dealer
53
CH
Rolex Submariner 5512 (New Old Stock) Unworn Steel 40mm Automatic
Rolex Submariner 5512 Gold Gilt Dial (RARE)
Php 6,312,449
Verified Dealer
46
US
Rolex Sky-Dweller 326934 Unworn Steel 42mm Automatic
Rolex Sky-Dweller "Blue-Dial", Ref. 326934-0003.
Php 1,398,688
Verified Dealer
32
DE
Breitling Chronoliner Y2431012/BE10 Very good Ceramic 46mm Automatic
Breitling Chronoliner Chronograph Keramik / Stahl Ref....
Php 295,539

Sold by Chrono24

DE
TAG Heuer Grand Carrera WAV511J Good Steel 40mm Automatic
TAG Heuer Grand Carrera
Php 107,961
Private Seller
 
UK
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 | LC100 | NEU | 2020 | Wimbledon
Php 673,009
Verified Dealer
127
DE
Rolex Day-Date 36 118138 New Yellow gold 36mm Automatic
Rolex Day-Date Ref.: 118138 NOS neu / Stickers Full Set
Php 1,457,210
Verified Dealer
174
DE
Rolex GMT-Master II 126710BLNR New Steel 40mm Automatic
Rolex GMT-Master II 126710BLNR Batman New May 2019
Php 1,106,075
Verified Dealer
10
MC
Breitling Chronomat 44 GMT AB042011/Q589 New Steel 44mm Automatic
Breitling Chronomat GMT AB042011/Q589 44mm
Php 298,465
Verified Dealer
50
RO
Rolex Pearlmaster 81208 New Yellow gold 34mm Automatic
TOP
Rolex Datejust Pearlmaster, yellow gold, white mop dial with...
Php 1,278,997
Verified Dealer
53
CH
Rolex Datejust 126334 Unworn Steel 41mm Automatic
Rolex Datejust 41 Ref.126334 2020 dark rhodium, Eu, unworn,...
Php 672,424
Verified Dealer
57
DE
Rolex Daytona 116519LN Unworn White gold 40mm Automatic
Rolex Cosmograph Daytona, Ref. 116519LN-0027
Php 1,925,390
Verified Dealer
32
DE
Omega Seamaster Aqua Terra 231.53.42.21.06.002 Very good Red gold 41.5mm Automatic
Omega Seamaster Aqua Terra 18K Gold Co-Axial 231.53.42.21.06.002
Php 553,038

Sold by Chrono24

DE
Omega Seamaster Omega Seamaster Special Edition 2589.30.00 Very good Steel 42mm Automatic
Omega Special Edition Seamaster Chronograph
Php 160,305
Private Seller
 
UK
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 | NEU | 2020 | FullSet
Php 754,940
Verified Dealer
127
DE
Breitling Navitimer 8 A13314101B1A1 New 43mm Automatic
Breitling Navitimer 8 Chronograph 43mm NEU
Php 198,976
Verified Dealer
174
DE
Rolex GMT-Master II 16710BLRO Very good Steel 40mm Automatic
Rolex GMT-Master II 16710BLRO Stick dial 2006 D series
Php 1,053,405
Verified Dealer
10
MC
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Datejust 41 Steel Silver Index Dial 41MM Watch 126334
Php 593,914
Free shipping
Verified Dealer
308
US
Rolex Lady-Datejust Pearlmaster 80319 New White gold 29mm Automatic
TOP
Rolex Lady-Datejust Pearlmaster, white gold, bezel set with 12...
Php 1,233,589
Verified Dealer
53
CH
Rolex Submariner (No Date) 124060 Unworn Steel 41mm Automatic
Rolex Submariner Ref.124060 2020/10, 41, Eu, unworn, Box&Papers
Php 719,242
Verified Dealer
57
DE
Rolex Submariner Date 116613LB Unworn Gold/Steel 40mm Automatic
Rolex Submariner Date "Bluesy", Ref. Ref. 116613LB.
Php 906,514
Verified Dealer
32
DE
Omega De Ville X2 7813.50.31 Very good Steel 35mm Automatic
Omega De Ville X2 Big Date Co-Axial Chronometer Automatik...
Php 143,380

Sold by Chrono24

DE
Tudor North Flag 91210N-0001 Very good Steel 40mm Automatic
Tudor North Flag 91210N Full Set
Php 161,500
Verified Dealer
6
HK
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date 126610LN | NEU | 2020 | FullSet
Php 871,985
Verified Dealer
127
DE
Graham 2AFAS Very good Steel 42mm Automatic
Graham Aeroflyback Ref. 2AFAS No. 0297
Php 169,130
Verified Dealer
174
DE
Rolex Daytona 116520 D Very good Steel 40mm Automatic
Rolex Daytona 116520 D series 2005
Php 1,404,540
Verified Dealer
10
MC
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41mm 2020 126334
Php 536,039
Verified Dealer
370
US
Breguet Classique 5140BA/12/9W6 New Yellow gold 40mm Automatic
TOP
Breguet Classique, yellow gold, extra-thin automatic movement
Php 692,475
Verified Dealer
53
CH
Rolex Submariner Date 126610LN Unworn Steel 41mm Automatic
Rolex Submariner Date Ref.126610LN 41mm, Eu, 2020, unworn, B&P
Php 818,730
Verified Dealer
57
DE
Rolex Submariner (No Date) 114060 Very good Silver 40mm Automatic
Rolex Submariner No Date, Ref. 114060-0002
Php 643,162
Verified Dealer
32
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...
Php 266,277

Sold by Chrono24

DE
Omega Seamaster Diver 300 M 212.30.41.20.03.001 Very good Steel 41mm Automatic
Omega Seamaster Diver
Php 158,211
Verified Dealer
172
SE
Rolex Datejust 126334 Unworn Steel 41mm Automatic
Rolex Datejust 41 | LC100 | Neu | 2020 | FullSet
Php 637,895
Verified Dealer
127
DE
Porsche Design Dashboard 6612.14 Very good Aluminum 42mm Automatic
Porsche Design PAC Dashboard Ref.: 6612.14/1
Php 116,460
Verified Dealer
174
DE
Rolex GMT-Master II 16710 Very good Steel 40mm Automatic
Rolex GMT-Master II 16710 Coke U Series 1997 Tritium
Php 754,940
Verified Dealer
10
MC
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date 41mm 126610LN 2020
Php 706,816
Verified Dealer
370
US
Jaquet-Droz Grande Seconde J014013208 New Rose gold 39mm Automatic
TOP
Jaquet-Droz Grande Seconde, 68 hours power reserve, limited...
Php 908,164
Verified Dealer
53
CH
Rolex Daytona 116520 Very good Steel 40mm Automatic
Rolex Daytona Citrus Lemon Dial Super Rare LC100 Collectors...
Php 8,177,466
Verified Dealer
177
DE
Tudor Black Bay Fifty-Eight M79030B-0001 New Steel 43mm Automatic
Tudor Black Bay 58 "Navy Blue" Ref. M79030B
Php 274,471
Verified Dealer
32
DE
Omega Constellation 368.1075 Very good Gold/Steel 35mm Automatic
Omega Constellation Stahl / Gold Automatik Herrenuhr Ref....
Php 102,414

Sold by Chrono24

DE
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Datejust 41 White Gold Rhodium Diamond Dial Watch 126334
Php 618,457
Free shipping
Verified Dealer
308
US
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 | NEU | 2020 | FullSet
Php 696,418
Verified Dealer
127
DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 Jubilee 126334 Rhodium Cannelée
Php 626,191
Verified Dealer
71
CH

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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