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Patek Philippe Platinum Blue Arabic Dial Chronograph B&P...
Top
Patek Philippe Platinum Blue Arabic Dial Chronograph B&P...
132,447 
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Watches & Jewellery of Bond Street Ltd
60
UK
Panerai Luminor 1950 Submersible 1000M PAM00243 aus 2010
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Panerai Luminor 1950 Submersible 1000M PAM00243 aus 2010
6,800 
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Uhren2000 GmbH
206
DE
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Rolex Day-Date
9,300 
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10
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Rolex Milgauss 116400GV Z-Blue Unworn
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Rolex Milgauss 116400GV Z-Blue Unworn
6,900 
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MASTROLORENZI S.A.S DI MATTIA MASTROLORENZI & CO.
46
IT
Rolex Day-Date 40 18 kt Weißgold Schwarz DIA 228239
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Rolex Day-Date 40 18 kt Weißgold Schwarz DIA 228239
31,400 
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Uhren2000 GmbH
206
DE
Omega SEAMASTER DIVER 300M CO-AXIAL 41 MM Ref. 212.32.41.20.04...
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Omega SEAMASTER DIVER 300M CO-AXIAL 41 MM Ref. 212.32.41.20.04...
4,700 
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180
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Ulysse Nardin Marine Diver Monaco 2016 (Limited Edition)
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Ulysse Nardin Marine Diver Monaco 2016 (Limited Edition)
9,950 
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22
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Rolex Day Date Rose Gold Diamant Blatt Ref.118235 Papiere
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Rolex Day Date Rose Gold Diamant Blatt Ref.118235 Papiere
22,900 
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34
DE
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Omega Speedmaster Chronograph Moonwatch Dark Side of the Moon
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Omega Speedmaster Chronograph Moonwatch Dark Side of the Moon
6,740 
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93
ES
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Chopard Mille Miglia Vintage Bleu 168945 3006
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Reclaimed Jewels
 
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Omega Speedmaster Automatic Chronometer Triple Calendar
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87
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Panerai Luminor Marina Lefth-Handed PAM00026
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Panerai Luminor Marina Lefth-Handed PAM00026
7,900 
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MASTROLORENZI S.A.S DI MATTIA MASTROLORENZI & CO.
46
IT
Chopard LUC Quattro Tourbillon 8 Days 950 Platin Limited 100 Stk.
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Chopard LUC Quattro Tourbillon 8 Days 950 Platin Limited 100 Stk.
69,500 
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Marks Uhren GmbH
5
DE
Omega Speedmaster Racing Co-Axial Chronograph 40 MM Ref....
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Omega Speedmaster Racing Co-Axial Chronograph 40 MM Ref....
2,750 
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180
IT
Patek Philippe Fixed Price Perpetual Calendar Chronograph...
Patek Philippe Fixed Price Perpetual Calendar Chronograph...
199,900 
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Premium Watches
10
FI
Rolex Submariner 16610 Date Stahl Uhr von 1991 Box+Papieren
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Rolex Submariner 16610 Date Stahl Uhr von 1991 Box+Papieren
6,900 
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Juwelier Edmund Arnold GmbH
34
DE
Rolex Lady-Datejust Pearlmaster 29MM, Diamond Bezel+Diamond Strap
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Rolex Lady-Datejust Pearlmaster 29MM, Diamond Bezel+Diamond Strap
30,000 
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M.J.WATCHES
45
BE
Breitling Galactic 44
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Breitling Galactic 44
2,949 
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Seiko GRAND SEIKO SBGH257 LIMITED EDITION 500PCS
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Seiko GRAND SEIKO SBGH257 LIMITED EDITION 500PCS
10,701 
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Przedsiębiorstwo Handlowe Usługowe
46
PL
Ulysse Nardin Manufacture 43 Limited 888 266 67
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Ulysse Nardin Manufacture 43 Limited 888 266 67
9,408 
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Noblesse LP
 
UK
Rolex Milgauss 116400GV Green Glass
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Rolex Milgauss 116400GV Green Glass
5,700 
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MASTROLORENZI S.A.S DI MATTIA MASTROLORENZI & CO.
46
IT
Hublot Big Bang Chronograph 44mm Limited Edition 10
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Hublot Big Bang Chronograph 44mm Limited Edition 10
9,900 
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Joaillerie Royale
203
BE
Rolex Sea Dweller Red Neuve
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12,700 
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A PORTEE DE MAIN
 
FR
Rolex Sea-Dweller
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10,000 
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FR
Rolex Submariner 116613 or/acier
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9,500 
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41 WATCH
 
FR
Rolex Datejust II Gold/Steel Jubilee Strap Sundust Dial,41MM
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Rolex Datejust II Gold/Steel Jubilee Strap Sundust Dial,41MM
9,800 
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M.J.WATCHES
45
BE
Omega Seamaster Aqua Terra 150M Co-Axial Day Date 41,5 MM
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Omega Seamaster Planet Ocean  45,5mm Co-Axial 600m
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Omega Seamaster Planet Ocean 45,5mm Co-Axial 600m
3,448 
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Omega Seamaster Planet Ocean GMT Ceragold 43,5
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Rolex Milgauss 116400
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5,200 
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MASTROLORENZI S.A.S DI MATTIA MASTROLORENZI & CO.
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Graham Chronofighter 43mm Roségold 2CFAR.B10A.C54B
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Patek Philippe Régulateur Quantième annuel 5235 Full Set
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37,500 
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Chopard Mille Miglia Gran Turismo XL 44 Tachymeter L.E. NEW
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Ulysse Nardin UN Maxi Marine Chronometer 43mm
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Breitling Chronomat 41MM Gold/Steel Black Dial, Full Set 2017
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7,100 
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Omega Seamaster Planet Ocean 215.30.44.21.03.001
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3,389 
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Ulysse Nardin Maxi Marine Diver Rose Gold
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Cartier Calibre de Cartier
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4,050 
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Rolex 18k Day-Date, Brown Degrade Stella Diamond Dial, Ref: 1803
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Omega Seamaster Aqua Terra 150M Co-Axial Chronograph 44 black ...
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3,990 
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Girard Perregaux Traveller Worldtimer Chronograph
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19,500 
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Rolex Submariner Date Steel 40MM Ceramic Full Set 116610LN
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Rolex Submariner Date Steel 40MM Ceramic Full Set 116610LN
8,000 
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45
BE
Omega Constellation Ref. 168.004 18k Gold Vintage
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Seiko ASTRON GPS SOLAR LIMITED EDITION SSE117J1
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Seiko ASTRON GPS SOLAR LIMITED EDITION SSE117J1
1,956 
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Panerai Luminor Submersible 2500 Special Edition Pam364
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Panerai Luminor Submersible 2500 Special Edition Pam364
7,290 
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92
HU
Baume & Mercier Classima Executives Chronograph Moonphase
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Baume & Mercier Classima Executives Chronograph Moonphase
3,150 
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Joaillerie Royale
203
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Rolex Datejust Midsize 18k White Gold with Diamond Dial,...
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Rolex Datejust Midsize 18k White Gold with Diamond Dial,...
8,657 
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Tempvs Ltd
45
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Rolex GMT II Ceramica art. Rg659
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208
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Omega Seamaster 300 Spectre 007 James Bond Limited Edition
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7,502 
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Rolex Rare S/S O/P UAE Air Force Pepsi Bezel GMT-Master...
Rolex Rare S/S O/P UAE Air Force Pepsi Bezel GMT-Master...
109,651 
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Watches & Jewellery of Bond Street Ltd
60
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Audemars Piguet Royal Oak Offshore Chronograph Pink Gold 42MM,...
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Audemars Piguet Royal Oak Offshore Chronograph Pink Gold 42MM,...
32,450 
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M.J.WATCHES
45
BE
Breitling Chronomat Evolution B13356 18k Gold & Steel
Breitling Chronomat Evolution B13356 18k Gold & Steel
3,421 
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Rolex Oyster Perpetual Datejust Stainless Steel White Gold Watch
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3,203 
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La Jolla Jewelry and Collateral Loan Company
9
US
Panerai Luminor Base 8 Days
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Panerai Luminor Base 8 Days
4,150 
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Deepsea
92
HU
Rolex Datejust
Rolex Datejust
7,014 
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LABELLE JEWELRY
 
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Rolex 18k Day-Date with Tridor White Dial Diamond Bezel,...
Top
Rolex 18k Day-Date with Tridor White Dial Diamond Bezel,...
15,755 
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Tempvs Ltd
45
UK
Rolex submariner art. Rb639
Rolex submariner art. Rb639
4,950 
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Stroppiana SRL
208
IT
Rolex Oyster Datejust II Jubilee Steel Blue Dial 41 mm (Full Set)
Rolex Oyster Datejust II Jubilee Steel Blue Dial 41 mm (Full Set)
6,100 
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Kleen Edelmetalen
109
NL
Omega Seamaster Professional 300m Automatic - 41 mm
Omega Seamaster Professional 300m Automatic - 41 mm
1,690 
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wagener-gold International e.K.
638
DE

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.