In the watch community, COSC and chronometer are often used interchangeably, sometimes incorrectly. It’s like whiskey and bourbon: all bourbon...
COSC
Brand Ginault Caliber Number 7275 Base Caliber Unknown Clone Caliber 2824-2 Diameter 26mm Height 4.65mm thick Jewels 25 Power Reserve...
Manufacturer Breitling Caliber Number B35 In-House? Yes COSC? Yes Diameter 36.60mm Vibrations Per Hour 28,800 bph (4 Hz) Power Reserve...
Manufacturer Tudor Caliber Number MT5612, MT-5612 In-House? Yes COSC? Yes Diameter 31.8mm Thickness 6.5mm Vibrations Per Hour 28,800 bph (4...
Brand Urwerk Caliber Number UR-9.01 Movement Type Automatic, self-winding In-House Yes Jewels 46 Total Parts Unknown (please add to comments...
Brand Rolex Caliber Number 3285 Movement Type Automatic, self-winding In-House Yes Diameter 28.5mm (needs confirmed) Jewels 31 Total Parts Unknown...
Brand Rolex Caliber Number 1570 Movement Type Automatic, self-winding In-House Yes Diameter 12.5”’ (28.5mm) Height 5.75mm thick Jewels 26 Total...
Brand Omega Caliber Number 8508 Base Caliber 8500 Movement Type Automatic, Chronograph Jewels 39 Power Reserve 60 hours Diameter 29mm...
What is the difference between caliber 6498-1 and 6498-2? There are two variations of the ETA/Unitas 6498 including the 6498-1...
Manufacturer Ulysse Nardin Caliber Number UN-22, UN22 Base Caliber ETA 2892-A2 In-House Base: No / Module: Yes Measurements 16 1/2”’...
Manufacturer Tudor Caliber Number MT5602, MT-5602 In-House Yes Diameter 31.8mm Thickness 6.5mm Vibrations Per Hour 28,800 bph (4 Hz) Power...
Brand Rolex Caliber Number 3000 Based On 3035 Movement Type Automatic, self-winding In-House Yes Diameter 12.5”’ (28.5mm) x 5.8mm thick...
Brand Rolex Caliber Number 3235 Based On 3035 -> 3135 Movement Type Automatic, self-winding In-House Yes Diameter 28.5mm Jewels 31...
Brand Rolex Caliber Number 4161 Base Caliber 4130 Movement Type Automatic In-House Yes Jewels 44 Total Parts 360+ Power Reserve...
Brand ETA Caliber Number 2836-2 Movement Type Automatic Jewels 25 Power Reserve 40 hours Vibrations Per Hour 28,800 Shock System...
Brand Rolex Caliber Number 3255 Movement Type Automatic In-House Yes Jewels 44 Total Parts 201 Power Reserve 70 hours Vibrations...
Manufacturer ETA Caliber Number 251.233 COSC Type Quartz, chronograph Diameter Unknown (please comment below) Battery Cell Number 394 Hacking? Yes...
Brand Rolex Caliber Number 4130 Movement Type Automatic In-House Yes Jewels 44 Total Parts 201 Power Reserve 72 hours Vibrations...
Manufacturer Ulysse Nardin Caliber Number UN-118, UN118 In-House Yes Measurements 11 1/2”’ Vibrations Per Hour 28,800 bph (4 Hz) Power...
Manufacturer Tudor Caliber Number MT5261, MT-5261 In-House Yes Measurements 33.8mm x 6.5mm Vibrations Per Hour 28,800 bph (4 Hz) Power...
Brand Omega Caliber Number 8605 Movement Type Automatic, Chronograph Power Reserve 60 hours Vibrations Per Hour 28,800bph Hairspring Silicon Si14...
Brand Ball Watch Caliber Number 2050 Base Caliber Soprod 2824 Movement Type Automatic Jewels 49 Power Reserve 38 hours Vibrations...
Brand Omega Caliber Number 9300 Movement Type Automatic, Chronograph In-House? Yes Jewels 54 Power Reserve 60 hours Vibrations Per Hour...
Manufacturer Breitling Caliber Number B04 Base Caliber B01 In-House Yes Certified Chronometer Yes Vibrations Per Hour 28,800 bph Power Reserve...