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Hermès Clipper XL Automatic - Box & inhouse certificate
TOP
Hermès Clipper XL Automatic - Box & inhouse certificate
Rp. 45,267,380
Free shipping
Seller
Pawndeluxe
187
NL
Rolex GMT-Master II 116759SARU june 2020 Rolex warranty
TOP
Rolex GMT-Master II 116759SARU june 2020 Rolex warranty
Rp. 1,136,122,496
Seller
MMC RIVIERA
6
MC
Rolex Vintage Turn-O-Graph 6202 mit Box und Papieren aus 1955
TOP
Rolex Vintage Turn-O-Graph 6202 mit Box und Papieren aus 1955
Rp. 585,635,648
Seller
TimeElements
31
DE
Rolex Day-Date 40 18 kt Weißgold Schwarz DIA 228239
TOP
Rolex Day-Date 40 18 kt Weißgold Schwarz DIA 228239
Rp. 574,096,832
Seller
Uhren2000 GmbH
363
DE
Breitling Crosswind
Breitling Crosswind
Rp. 40,000,000
Seller
Timeology.co.id
ID
Omega CONSTELLATION OMEGA CO-AXIAL 38 MM ROSE GOLD
TOP
Omega CONSTELLATION OMEGA CO-AXIAL 38 MM ROSE GOLD
Rp. 192,057,952
Seller
Plus Watch - Luxury Watches
2988
IT
Gérald Genta Arena Sport Retro SSPL10 Men's Watch - Papers
TOP
Gérald Genta Arena Sport Retro SSPL10 Men's Watch - Papers
Rp. 46,154,976
Free shipping
Seller
Pawndeluxe
187
NL
Rolex GMT-Master II 116758SARU
Rolex GMT-Master II 116758SARU
Rp. 2,321,303,296
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Sinn 103 St Sa RB Classic Watch Sondermodell
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
Rp. 43,492,188
Seller
Classic Watch
22
DE
Breitling Bentley Supersport
Breitling Bentley Supersport
Rp. 78,108,424
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
285
DE
IWC Portuguese Chronograph 41mm IW371445 Ex IW371401
IWC Portuguese Chronograph 41mm IW371445 Ex IW371401
Rp. 101,008,392
Free shipping
Seller
SORELLE RONCO
766
IT
Breitling Galactic 36 Automatic Steel & Rose Gold
Breitling Galactic 36 Automatic Steel & Rose Gold
Rp. 69,283,264
Seller
King Jewelers
 
US
Bulgari Carbon Gold
Bulgari Carbon Gold
Rp. 35,503,828
Seller
MEGA WATCHES
9
IT
Rolex Submariner Date
Rolex Submariner Date
Rp. 102,317,880
Seller
Uhrmageren.com
11
DK
Chopard Mille Miglia Gran Turismo XL - Limited Edition Box &...
TOP
Chopard Mille Miglia Gran Turismo XL - Limited Edition Box &...
Rp. 60,356,508
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Pawndeluxe
187
NL
Rolex Datejust 41mm Slate Oyster 2018 verklebt
Rolex Datejust 41mm Slate Oyster 2018 verklebt
Rp. 146,453,296
Seller
LUXUS-PORT
52
DE
Rolex Submariner Date Steel Green Bezel
Rolex Submariner Date Steel Green Bezel
Rp. 281,584,192
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Rolex 16700 16700 GMT Master Red / Blue Pepsi Bezel (29479)
Rolex 16700 16700 GMT Master Red / Blue Pepsi Bezel (29479)
Rp. 167,819,488
Seller
European Watch Company
169
US
Rolex Daydate
Rolex Daydate
Rp. 235,212,848
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
285
DE
Omega Seamaster AQUA TERRA Co-Axial Master Chronometer.Steel
Omega Seamaster AQUA TERRA Co-Axial Master Chronometer.Steel
Rp. 70,120,056
Free shipping
Seller
SORELLE RONCO
766
IT
Rolex Sea-Dweller 4000, Ref. 116600, Full Set, LC100
Rolex Sea-Dweller 4000, Ref. 116600, Full Set, LC100
Rp. 187,992,768
Seller
time4watches GmbH
23
DE
Rolex Sea-Dweller 126600 '50th Anniversary' - Box & Papers
Rolex Sea-Dweller 126600 '50th Anniversary' - Box & Papers
Rp. 220,019,184
Seller
Bloombar Watches
57
UK
B.R.M DDF-12-44-SQ-AJ
TOP
B.R.M DDF-12-44-SQ-AJ
Rp. 177,341,616
Free shipping
Seller
Solexport International
MU
Omega Speedmaster Broad Arrow
Omega Speedmaster Broad Arrow
Rp. 60,356,508
Seller
Marengo Srl
 
IT
Breitling Navitimer World aus 2016 , Full Set, MINT Condition
Breitling Navitimer World aus 2016 , Full Set, MINT Condition
Rp. 71,007,656
Seller
LUXUS-PORT
52
DE
Rolex Sea-Dweller NOS 16600
Rolex Sea-Dweller NOS 16600
Rp. 186,713,520
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Omega 233.32.41.21.01.001 Omega Seamaster 300M Limited Edition...
Omega 233.32.41.21.01.001 Omega Seamaster 300M Limited Edition...
Rp. 183,215,760
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European Watch Company
169
US
Rolex Submariner
Rolex Submariner
Rp. 316,871,680
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
285
DE
Breitling Superocean 44 Special Total Blue Ocean Racer II Rubber
Breitling Superocean 44 Special Total Blue Ocean Racer II Rubber
Rp. 48,107,688
Free shipping
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SORELLE RONCO
766
IT
Rolex Sea-Dweller Deepsea, V-Serie, 116660, MK I, Full Set, LC100
Rolex Sea-Dweller Deepsea, V-Serie, 116660, MK I, Full Set, LC100
Rp. 148,938,544
Seller
time4watches GmbH
23
DE
Omega Seamaster Diver 300 M Co-Axial 41 mm
Omega Seamaster Diver 300 M Co-Axial 41 mm
Rp. 44,574,256
Seller
Millennium Watches
 
SE
B.R.M CT-48-AR
TOP
B.R.M CT-48-AR
Rp. 211,247,776
Free shipping
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Solexport International
MU
Omega Speedmaster Broad Arrow 3551500
Omega Speedmaster Broad Arrow 3551500
Rp. 41,823,508
Seller
Henry´s Auktionshaus AG
DE
Rolex Sea-dweller 126600 – New Model
Rolex Sea-dweller 126600 – New Model
Rp. 204,147,008
Seller
Mall of the Watch
864
MC
Rolex Unworn GMT-Master II
Rolex Unworn GMT-Master II
Rp. 200,843,200
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Rolex 16710 GMT Master II SS Black (29112)
Rolex 16710 GMT Master II SS Black (29112)
Rp. 130,868,400
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European Watch Company
169
US
Rolex Yacht Master Damenuhr
Rolex Yacht Master Damenuhr
Rp. 159,767,216
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
285
DE
Breitling SUPER AVENGER II Chrono 48mm Steel Black Chablon Dial
Breitling SUPER AVENGER II Chrono 48mm Steel Black Chablon Dial
Rp. 67,457,272
Free shipping
Seller
SORELLE RONCO
766
IT
Rolex GMT Master II, Z-Serie, 16710 BLRO, Rectangular, 3186
Rolex GMT Master II, Z-Serie, 16710 BLRO, Rectangular, 3186
Rp. 266,101,184
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time4watches GmbH
23
DE
Rolex Datejust 41 Dark Rhodium 18k White Gold/Steel Jubilee...
Rolex Datejust 41 Dark Rhodium 18k White Gold/Steel Jubilee...
Rp. 152,230,816
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CKLY Trading Limited
16
HK
Omega CO-AXIAL GMT 43.5MM 232.90.44.22.03.001
Omega CO-AXIAL GMT 43.5MM 232.90.44.22.03.001
Rp. 106,788,616
Free shipping
Seller
Exquisite Timepieces
21
US
Rolex Datejust Medium
Rolex Datejust Medium
Rp. 53,078,224
Seller
Henry´s Auktionshaus AG
DE
TAG Heuer Carrera Calibre Heuer Heuer02t Cosc – Car5a8w.ft6071
TAG Heuer Carrera Calibre Heuer Heuer02t Cosc – Car5a8w.ft6071
Rp. 175,743,952
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Mall of the Watch
864
MC
Rolex Rare Tiffany & Co Explorer I 14270
Rolex Rare Tiffany & Co Explorer I 14270
Rp. 333,056,544
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Rolex 116710BLNR GMT Master II Ceramic Black & Blue "Batman"...
Rolex 116710BLNR GMT Master II Ceramic Black & Blue "Batman"...
Rp. 207,849,824
Seller
European Watch Company
169
US
Omega Seamaster Automatic Chrono
Omega Seamaster Automatic Chrono
Rp. 43,492,188
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
285
DE
Breitling SUPEROCEAN II 44 Total Blue Diver Pro III Chrono...
Breitling SUPEROCEAN II 44 Total Blue Diver Pro III Chrono...
Rp. 43,847,228
Free shipping
Seller
SORELLE RONCO
766
IT
Rolex Yacht Master, Referenz 116622, FULL SET, LC100
Rolex Yacht Master, Referenz 116622, FULL SET, LC100
Rp. 141,837,792
Seller
time4watches GmbH
23
DE
Omega Seamaster Planet Ocean 600M Master Chronometer Black...
Omega Seamaster Planet Ocean 600M Master Chronometer Black...
Rp. 63,837,588
Seller
CKLY Trading Limited
16
HK
Omega Diver 300M Co-Axial 41mm 212.30.41.20.01.003
Omega Diver 300M Co-Axial 41mm 212.30.41.20.01.003
Rp. 47,728,476
Free shipping
Seller
Exquisite Timepieces
21
US
Breitling Navitimer World A24322
Breitling Navitimer World A24322
Rp. 79,706,088
Seller
Henry´s Auktionshaus AG
DE
Breitling Superocean Heritage II 46mm – Ab202016/c961/205s
Breitling Superocean Heritage II 46mm – Ab202016/c961/205s
Rp. 49,527,840
Seller
Mall of the Watch
864
MC
Rolex GMT-Master II 116710LN
Rolex GMT-Master II 116710LN
Rp. 136,250,400
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Rolex 1680 Submariner RED MK IV Circa 1970 SS (29570)
Rolex 1680 Submariner RED MK IV Circa 1970 SS (29570)
Rp. 414,159,968
Seller
European Watch Company
169
US
Rolex Sea Dweller
Rolex Sea Dweller
Rp. 203,259,424
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
285
DE
Breitling AVENGER HURRICANE 50mm 24 Hours Yellow Textile
Breitling AVENGER HURRICANE 50mm 24 Hours Yellow Textile
Rp. 106,333,968
Free shipping
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SORELLE RONCO
766
IT
Panerai Luminor Submersible 1950 Carbotech, 3 Days PAM 00616
Panerai Luminor Submersible 1950 Carbotech, 3 Days PAM 00616
Rp. 274,977,152
Seller
time4watches GmbH
23
DE
Omega Seamaster Aqua Terra 150M Master Chronometer Blue Steel...
Omega Seamaster Aqua Terra 150M Master Chronometer Blue Steel...
Rp. 56,176,844
Seller
CKLY Trading Limited
16
HK
Rolex Oyster Perpetual - Ref: 1002 - 71/72 - Service 08.18
Rolex Oyster Perpetual - Ref: 1002 - 71/72 - Service 08.18
Rp. 49,705,356
Seller
mostwantedwatches MWW GmbH
 
DE
Rolex Pearlmaster Diamonds Reference 69308
Rolex Pearlmaster Diamonds Reference 69308
Rp. 317,759,232
Seller
Henry´s Auktionshaus AG
DE
Omega Seamaster Diver 300 M Co-Axial 41 mm
Omega Seamaster Diver 300 M Co-Axial 41 mm
Rp. 44,574,256
Seller
Millennium Watches
 
SE
Rolex Submariner Nipple Dial 1680
Rolex Submariner Nipple Dial 1680
Rp. 595,464,768
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
235
UK
Rolex 116660 Sea Dweller Deep Sea (29188)
Rolex 116660 Sea Dweller Deep Sea (29188)
Rp. 150,113,760
Seller
European Watch Company
169
US
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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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