Log in
Brand
Model
Price
Case diameter
Year
Location
More
Your selection
Clear selection

Your selection
Clear selection

Your selection
Clear selection

Sorry, your search did not match any items
Your selection
Clear selection

Sorry, your search did not match any items
Your selection
Clear selection

Sorry, your search did not match any items
Basic information
Type of watch
Categories
More...
Reference number
More...
New/Pre-owned
Offer type
Gender
Availability
Condition
More...
Scope of delivery
Characteristics & functions
Movement
Case material
More...
Dial
More...
Glass
More...
Functions
More...
Thickness
More...
Bezel material
More...
Dial numerals
Water resistance
More...
Others
Bracelet/strap
Bracelet material
More...
Clasp
More...
Lug width
More...
Bracelet color
More...
Clasp material
More...
Save this search Cancel

View

Sort by

TOP
Omega Seamaster Aqua Terra
£3,755
Verified Dealer
28
SE
TOP
Rolex Sky-Dweller Weißgold / Leder Ref. 326139 aus 2014 LC100
£21,846
Verified Dealer
470
DE
TOP
Breitling Navitimer 01 Stratos Grey Limited Edition
£6,006
Verified Dealer
100
FR
TOP
Chopard 161926-5001 L.U.C Quattro - 9 Day Power Reserve
£14,750
Free shipping
Verified Dealer
114
UK
TOP
Rolex Submariner Kermit 16610LV
£29,950
Free shipping
Verified Dealer
443
UK
Rolex Mens Rolex Datejust Blue Diamond Sapphire 18k White Gold...
£3,147
Free shipping
Verified Dealer
 
US
Panerai Submersible, PAM 00382, Limitierte Edition, 1000 St.
£30,889
Verified Dealer
40
DE
TOP
Omega Seamaster Aqua Terra
£3,220
Verified Dealer
 
UK
Rolex Datejust II 41 mm White index from 2017 with box and papers
£7,093
Verified Dealer
616
NL
TOP
Omega Seamaster Railmaster Trilogy 57 Limited Edition
£4,495
Free shipping
Verified Dealer
94
UK
Vacheron Constantin Historiques Chronomètre Royal 1907 -...
£26,500
Free shipping
Verified Dealer
22
UK
Rolex Datejust 41 126334 - Blue Dial - Box & Papers
£8,250
Verified Dealer
173
UK
Breitling Superocean II 44 Steel - ref A17392D7/BD68
£2,990
Verified Dealer
68
UK
Rolex Daytona 16518
£13,950
Free shipping
Verified Dealer
443
UK
Rolex Authentic Rolex Mens Datejust Two Tone Ruby Diamond...
£4,170
Free shipping
Verified Dealer
 
US
Panerai Luminor Submersible 1950 Carbotech, 3 Days PAM 616
£11,741
Verified Dealer
40
DE
Breitling Chronomat 41 AB0140AF/A744
£5,351
Free shipping
Verified Dealer
651
US
Rolex Datejust 41mm Rhodium Dial 2019 UNWORN
£9,370
Verified Dealer
246
UK
Omega Seamaster Aqua Terra 150m Co-axial Master Chronometer - NEW
£3,500
Verified Dealer
5
UK
Rolex Submariner Date Reference 16610 T
£6,412
Verified Dealer
39
US
Omega Seamaster Planet Ocean 600M - 2900.50.91 - Box & Papers
£2,800
Verified Dealer
173
UK
TOP
Rolex Submariner Date Ref.116613LB Gold/Steel Blue Index
£10,662
Verified Dealer
259
NL
Rolex GMT-Master 16750
£11,500
Free shipping
Verified Dealer
443
UK
Rolex Ladies Rolex Datejust Quickset Two-tone Watch + 1.13 Ct...
£2,908
Free shipping
Verified Dealer
 
US
Omega New 2019 50th Anniversary Speedmaster Professional...
£9,995
Verified Dealer
42
UK
Rolex Day-Date Cherry 18K White Gold Box & Pap
£13,142
Free shipping
Verified Dealer
377
PL
Omega Seamaster 300M Spectre Limited Edition - B&P 2015
£8,530
Verified Dealer
246
UK
TOP
Omega Olympic official timekeeper pink gold full set
£7,746
Verified Dealer
28
UK
Panerai Luminor PAM 00102, Tritium "T SWISS T", B-Serie
£6,867
Verified Dealer
40
DE
Rolex Sea-Dweller 126600 '50th Anniversary' - Box & Papers
£11,600
Verified Dealer
173
UK
Breitling Navitimer 1 Chronograph Steel A13315351C1A1
£2,951
Verified Dealer
68
UK
Rolex Big Red Daytona 6263
£79,950
Free shipping
Verified Dealer
443
UK
Rolex Authentic Mens Rolex Datejust Ice Blue Diamond 18k White...
£3,540
Free shipping
Verified Dealer
 
US
Omega Seamaster 300 Spectre Limited Edition Full Set James Bond
£6,945
Verified Dealer
135
UK
Hublot Big Bang Chronograph - FULL SET - Perfect - 41mm Steel...
£6,267
Verified Dealer
22
IT
Omega Speedmaster Professional Moonwatch Apollo 11 - 2019 Unworn
£11,455
Verified Dealer
246
UK
Rolex Datejust 41 Steel and White Gold, BLUE Dial - NEW 2019
£8,400
Verified Dealer
5
UK
Rolex Datejust 41 with Box and Papers
£8,695
Verified Dealer
235
UK
Omega Seamaster Aqua Terra - 231.12.42.21.01.002 - Box & Papers
£3,050
Verified Dealer
173
UK
Breitling Avenger II
£3,557
Verified Dealer
68
UK
Rolex Yacht-Master II 116689
£22,000
Free shipping
Verified Dealer
443
UK
Rolex MINT 2017 Rolex Yacht-Master II 44mm Stainless White...
£11,546
Free shipping
Verified Dealer
232
US
Omega Apollo 11 50th Anniversary Speedmaster Moonwatch Limited
£10,250
Verified Dealer
135
UK
Breitling SUPER AVENGER II
£3,438
Verified Dealer
144
IT
Rolex Datejust 41 126334 Black Diamond Jubilee 2018
£9,370
Verified Dealer
246
UK
Omega Seamaster Planet Ocean Master Chronometer 43.5mm - NEW 2019
£4,600
Verified Dealer
5
UK
Omega Seamaster 300 with Box and Papers
£3,395
Verified Dealer
235
UK
Rolex Datejust 31, new, closing down sale - off. pr.: 37.700 CHF
£19,852
Verified Dealer
29
CH
Breitling Superocean 44 M1739313/BE92
£2,990
Verified Dealer
68
UK
Rolex Datejust Rare Official Red Semi-BubbleBack Vintage 6105
£9,500
Free shipping
Verified Dealer
443
UK
Breitling Avenger Seawolf Stahl grey Dial Kautschukband...
£2,088
Verified Dealer
DE
Rolex Submariner Stainless Steel Ref. 5512 Black Matte 4-Line...
Price on request
Verified Dealer
6
US
Omega Speedmaster Broad Arrow - 321.93.42.50.13.001 - Box &...
£4,000
Verified Dealer
173
UK
Breitling Bentley for Bentley Motors A25362 - Serviced By...
£4,680
Verified Dealer
246
UK
Rolex Datejust 41 Steel and White Gold, BLUE Roman Dial - NEW...
£8,300
Verified Dealer
5
UK
Omega Seamaster 300 "Spectre" with Box and Papers
£7,195
Verified Dealer
235
UK
Rolex Lady-Datejust 26, new, closing down sale - o.p.: 24.200 CHF
£10,720
Verified Dealer
29
CH
Breitling Navitimer 8 Chronograph Steel A13314101B1A1
£3,108
Verified Dealer
68
UK
Rolex GMT-Master II Batman 116710BLNR
£12,950
Free shipping
Verified Dealer
443
UK
Rolex Sea-Dweller Deepsea D-Blue James Cameron Edition
£11,097
Verified Dealer
1252
NL
TOP
Omega Vintage Constellation
£1,400
Private Seller
 
UK
Breitling Navitimer 01
£5,000
Verified Dealer
59
UK
Breitling Bentley Motors Yellow Gold - Serviced by Breitling
£12,180
Verified Dealer
246
UK
Omega Seamaster Aqua Terra 150m Co-axial Master Chronometer - NEW
£3,400
Verified Dealer
5
UK
  • 30
  • 60
  • 120

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.