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Franck Muller 18Kt Perpetual Calendar Moon folding closure
TOP
Franck Muller 18Kt Perpetual Calendar Moon folding closure
Php 863,812
Seller
Ingo Freiherr von Seld
9
DE
Rolex GMT-Master II 116759SARU june 2020 Rolex warranty
TOP
Rolex GMT-Master II 116759SARU june 2020 Rolex warranty
Php 3,830,927
Seller
MMC RIVIERA
6
MC
Rolex LADY PEARLMASTER DATEJUST MASTERPIECE GOLD DIAMANT DIAMOND
TOP
Rolex LADY PEARLMASTER DATEJUST MASTERPIECE GOLD DIAMANT DIAMOND
Php 1,111,587
Seller
Timeless Watches GmbH
218
DE
Perrelet Turbine Macau  (Limited Edition)
TOP
Perrelet Turbine Macau (Limited Edition)
Php 253,335
Free shipping
Seller
Istock LTD
99
LV
Ulysse Nardin Maxi Marine Diver 200m 45mm NEW
TOP
Ulysse Nardin Maxi Marine Diver 200m 45mm NEW
Php 370,117
Seller
Timepiece Bank
380
BE
Omega De Ville Prestige 18K Gold Luxusuhr Goldband Unisex...
TOP
Omega De Ville Prestige 18K Gold Luxusuhr Goldband Unisex...
Php 432,462
Seller
Uhrenkapital
322
DE
Bulgari Diagono Scuba SC38G 18K Gold Chronograph - FULL SET
TOP
Bulgari Diagono Scuba SC38G 18K Gold Chronograph - FULL SET
Php 339,840
Free shipping
Seller
Pawndeluxe
138
NL
Rolex Day-Date 40 Everose-Gold 228345RBR Choco Diamant
TOP
Rolex Day-Date 40 Everose-Gold 228345RBR Choco Diamant
Php 2,444,378
Seller
Uhren2000 GmbH
341
DE
Hublot King Power F1 India,  Ltd Edition, Box & Papers
TOP
Hublot King Power F1 India, Ltd Edition, Box & Papers
Php 1,138,176
Seller
Tempvs Ltd
108
UK
Rolex Daydate
Rolex Daydate
Php 540,655
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
229
DE
Panerai Luminor Marina Automatic Acciaio
Panerai Luminor Marina Automatic Acciaio
Php 323,775
Seller
LUX-Timepieces GmbH
632
DE
Ball GM1020D-LCJ-BK Trainmaster WorldTime Automatic Black Dial...
Ball GM1020D-LCJ-BK Trainmaster WorldTime Automatic Black Dial...
Php 65,093
Free shipping
Seller
The Watch Outlet
8
US
Breitling Navitimer Heritage Blue Dial
Breitling Navitimer Heritage Blue Dial
Php 216,921
Seller
The Watch Movement
 
US
Omega Constellation
Omega Constellation
Php 77,236
Seller
Niklas Heyns
 
DE
Rolex Sea-Dweller
Rolex Sea-Dweller
Php 759,414
Seller
Labelle Jewelry
40
US
Omega Seamaster Planet Ocean 600m Co-Axial Ceramic 232.30.38.2...
TOP
Omega Seamaster Planet Ocean 600m Co-Axial Ceramic 232.30.38.2...
Php 163,741
Free shipping
Seller
Pawndeluxe
138
NL
Rolex Submariner Ref. 16610
Rolex Submariner Ref. 16610
Php 370,117
Seller
Henry´s Auktionshaus AG
DE
Omega Seamaster DIVER 300 Co-Axial 300 M 41 mm  Blue Dial
Omega Seamaster DIVER 300 Co-Axial 300 M 41 mm Blue Dial
Php 169,920
Free shipping
Seller
SORELLE RONCO
606
IT
Rolex Damenuhr  Datejust
Rolex Damenuhr Datejust
Php 417,077
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
229
DE
Breitling Navitimer 01 (46mm)
Breitling Navitimer 01 (46mm)
Php 389,272
Seller
LUX-Timepieces GmbH
632
DE
Ball WATCH ENGINEER HYDROCARBON AIRBORNE MEN'S 42MM WATCH...
Ball WATCH ENGINEER HYDROCARBON AIRBORNE MEN'S 42MM WATCH...
Php 103,280
Free shipping
Seller
The Watch Outlet
8
US
Rolex Air King
Rolex Air King
Php 203,286
Seller
Pfandhaus SCHUMACHERS GmbH
5
DE
Breitling Avenger II Seawolf
Breitling Avenger II Seawolf
Php 130,131
Seller
The Watch Movement
 
US
Rolex Datejust 126334
Rolex Datejust 126334
Php 499,043
Seller
Labelle Jewelry
40
US
Ulysse Nardin Marine Chronometer Blue Dial - FULL SET / 263-67
TOP
Ulysse Nardin Marine Chronometer Blue Dial - FULL SET / 263-67
Php 222,441
Free shipping
Seller
Pawndeluxe
138
NL
Panerai Ferrari FER00003 Full Set
Panerai Ferrari FER00003 Full Set
Php 215,644
Seller
Henry´s Auktionshaus AG
DE
Rolex Yacht-Master Blu Dial Oyster Rolesium 40mm 116622
Rolex Yacht-Master Blu Dial Oyster Rolesium 40mm 116622
Php 611,712
Free shipping
Seller
SORELLE RONCO
606
IT
Breitling Herrenarmbanduhr Galactic 44
Breitling Herrenarmbanduhr Galactic 44
Php 182,278
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
229
DE
Breitling Navitimer 1 Chronograph 41
Breitling Navitimer 1 Chronograph 41
Php 250,246
Seller
LUX-Timepieces GmbH
632
DE
Omega Seamaster Aqua Terra Men’s Stainless Steel Automatic...
Omega Seamaster Aqua Terra Men’s Stainless Steel Automatic...
Php 121,506
Free shipping
Seller
The Watch Outlet
8
US
Ulysse Nardin Marine Chronometer Automatic Mens Watch 1183-126...
Ulysse Nardin Marine Chronometer Automatic Mens Watch 1183-126...
Php 346,889
Seller
Watch Obsession
5
US
Breitling Transocean Unitime Pilot
Breitling Transocean Unitime Pilot
Php 271,165
Seller
The Watch Movement
 
US
Rolex Lady-Datejust, Ref. 79178, Zustand sehr gut (1)
Rolex Lady-Datejust, Ref. 79178, Zustand sehr gut (1)
Php 444,264
Seller
S3 WATCH AG
17
DE
Omega Seamaster Planet Ocean
Omega Seamaster Planet Ocean
Php 185,367
Seller
COMPRA-VENTA JAVIER CALVO
ES
Breitling Navitimer World A24322
Breitling Navitimer World A24322
Php 277,433
Seller
Henry´s Auktionshaus AG
DE
IWC Portuguese Chronograph 41mm IW371445 Ex IW371401
IWC Portuguese Chronograph 41mm IW371445 Ex IW371401
Php 351,580
Free shipping
Seller
SORELLE RONCO
606
IT
Corum Herrenarmbanduhr Automatic Gangreserve
Corum Herrenarmbanduhr Automatic Gangreserve
Php 92,684
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
229
DE
Breitling BENTLEY B06 MIDNIGHT CARBON CHRONOGRAPH LIMITED EDITION
Breitling BENTLEY B06 MIDNIGHT CARBON CHRONOGRAPH LIMITED EDITION
Php 617,891
Seller
LUX-Timepieces GmbH
632
DE
Breitling Navitimer 46mm World GMT Blue Dial Brown Leather...
Breitling Navitimer 46mm World GMT Blue Dial Brown Leather...
Php 218,711
Free shipping
Seller
The Watch Outlet
8
US
Chopard Men's 168511-3001 Mille Miglia Chronograph Watch
Chopard Men's 168511-3001 Mille Miglia Chronograph Watch
Php 197,478
Seller
HarveyStore DE
13
DE
TAG Heuer Watch Grand Carrera CAV5185.FT6020
TAG Heuer Watch Grand Carrera CAV5185.FT6020
Php 251,778
Seller
Watchfinder.co.uk Ltd
UK
Rolex GMT-Master II, Ref. 126711CH, LC100, unworn, Full Set
Rolex GMT-Master II, Ref. 126711CH, LC100, unworn, Full Set
Php 901,504
Seller
S3 WATCH AG
17
DE
Rolex Datejust 41--126334--2018--EU--
Rolex Datejust 41--126334--2018--EU--
Php 447,971
Seller
Marchal Watches
 
NL
Breitling Superocean Heritage U2337012/BB81
Breitling Superocean Heritage U2337012/BB81
Php 326,865
Seller
Henry´s Auktionshaus AG
DE
Omega Seamaster AQUA TERRA Co-Axial Master Chronometer.Steel
Omega Seamaster AQUA TERRA Co-Axial Master Chronometer.Steel
Php 244,067
Free shipping
Seller
SORELLE RONCO
606
IT
Omega De Ville Automatic Co Axial Chronograph
Omega De Ville Automatic Co Axial Chronograph
Php 206,994
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
229
DE
Rolex Submariner Date
Rolex Submariner Date
Php 1,606,518
Seller
LUX-Timepieces GmbH
632
DE
Breitling Chronomat Evolution Rose Gold and Stainless Steel...
Breitling Chronomat Evolution Rose Gold and Stainless Steel...
Php 233,248
Free shipping
Seller
The Watch Outlet
8
US
Breitling Men's A1733110/BC30/152S/A20SS.1 Avenger II Seawolf...
Breitling Men's A1733110/BC30/152S/A20SS.1 Avenger II Seawolf...
Php 155,709
Seller
HarveyStore DE
13
DE
Rolex Sea Dweller 16600T
Rolex Sea Dweller 16600T
Php 379,653
Free shipping
Seller
Simply Watches USA
 
US
Omega Watch Planet Ocean 232.30.38.20.01.001
Omega Watch Planet Ocean 232.30.38.20.01.001
Php 200,733
Seller
Watchfinder.co.uk Ltd
UK
Omega Seamaster America's Cup
Omega Seamaster America's Cup
Php 135,936
Seller
COMPRA-VENTA JAVIER CALVO
ES
Rolex Date 115200
Rolex Date 115200
Php 265,075
Seller
Henry´s Auktionshaus AG
DE
TAG Heuer Grand Carrera Cal.36RS Cronograph Automatic CAV5185F...
TAG Heuer Grand Carrera Cal.36RS Cronograph Automatic CAV5185F...
Php 456,004
Free shipping
Seller
SORELLE RONCO
606
IT
Omega Seamaster Co Axial Aqua Terra
Omega Seamaster Co Axial Aqua Terra
Php 194,636
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
229
DE
Omega Speedmaster Racing Co-Axial Chronometer Chronograph...
Omega Speedmaster Racing Co-Axial Chronometer Chronograph...
Php 344,166
Seller
LUX-Timepieces GmbH
632
DE
Rolex 116900 AIR-KING 40MM STEEL BLACK DIAL OYSTER PERPETUAL...
Rolex 116900 AIR-KING 40MM STEEL BLACK DIAL OYSTER PERPETUAL...
Php 317,326
Free shipping
Seller
The Watch Outlet
8
US
Zenith Men's 95.9000.9004/78.R582 Defy El Primero 21 - 44.00
Zenith Men's 95.9000.9004/78.R582 Defy El Primero 21 - 44.00
Php 469,289
Seller
HarveyStore DE
13
DE
Rolex Submariner Date
Rolex Submariner Date
Php 482,862
Seller
Vine Jewellers Ltd
 
UK
Omega Watch Seamaster 300m 2254.50.00
Omega Watch Seamaster 300m 2254.50.00
Php 162,104
Seller
Watchfinder.co.uk Ltd
UK
Omega Constellation Men
Omega Constellation Men
Php 215,953
Seller
Pfandhaus SCHUMACHERS GmbH
5
DE
Rolex Datejust Medium
Rolex Datejust Medium
Php 184,750
Seller
Henry´s Auktionshaus AG
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.

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