126000Rolex Oyster Perpetual 36$10,5008.0% over 126710GRNRRolex Bruce Wayne$24,00023.5% over 310.30.42.50.01.001Omega Moonwatch$5,8906.2% over 124060Rolex Submariner$12,9905.7% over 124300Rolex Oyster Perpetual 41$9,99015.0% over 224270Rolex Explorer$9,4909.1% over 126610LNRolex Submariner Date$14,5009.1% over 126900Rolex Air-King$9,50014.8% over 215.30.44.21.01.001Omega Seamaster Planet Ocean 600M$4,59512.3% over 126610LNRolex Submariner Date$14,0005.4% over 79030BTudor Black Bay 58$2,69910.8% under 79830RBTudor Pepsi$3,2005.8% under 126500LNRolex Cosmograph Daytona$33,75915.4% over 124300Rolex Oyster Perpetual 41$9,0003.6% over 126622Rolex Yacht-Master 40$15,89713.6% over 126334Rolex Datejust 41$12,9414.5% under 126600Rolex Sea-Dweller$11,9501.5% under 116520Rolex Cosmograph Daytona$27,53926.2% over 126333Rolex Datejust 41$15,5007.8% over SBGA211Grand Seiko Snowflake$5,07514.0% over 15510STAudemars Piguet Royal Oak Selfwinding 41$38,9009.4% under 226570Rolex Explorer II$11,3003.5% over 326934Rolex Sky-Dweller$16,9884.5% under 228238Rolex Day-Date 40$63,67536.9% over 126300Rolex Datejust 41$9,00211.3% under 79000NTudor Black Bay 54$3,89913.5% over 126334Rolex Datejust 41$12,2669.5% under 126610LVRolex Starbucks$15,69513.7% over 116610LVRolex Hulk$21,89515.9% over 126300Rolex Datejust 41$10,9958.3% over

126000Rolex Oyster Perpetual 36$10,5008.0% over 126710GRNRRolex Bruce Wayne$24,00023.5% over 310.30.42.50.01.001Omega Moonwatch$5,8906.2% over 124060Rolex Submariner$12,9905.7% over 124300Rolex Oyster Perpetual 41$9,99015.0% over 224270Rolex Explorer$9,4909.1% over 126610LNRolex Submariner Date$14,5009.1% over 126900Rolex Air-King$9,50014.8% over 215.30.44.21.01.001Omega Seamaster Planet Ocean 600M$4,59512.3% over 126610LNRolex Submariner Date$14,0005.4% over 79030BTudor Black Bay 58$2,69910.8% under 79830RBTudor Pepsi$3,2005.8% under 126500LNRolex Cosmograph Daytona$33,75915.4% over 124300Rolex Oyster Perpetual 41$9,0003.6% over 126622Rolex Yacht-Master 40$15,89713.6% over 126334Rolex Datejust 41$12,9414.5% under 126600Rolex Sea-Dweller$11,9501.5% under 116520Rolex Cosmograph Daytona$27,53926.2% over 126333Rolex Datejust 41$15,5007.8% over SBGA211Grand Seiko Snowflake$5,07514.0% over 15510STAudemars Piguet Royal Oak Selfwinding 41$38,9009.4% under 226570Rolex Explorer II$11,3003.5% over 326934Rolex Sky-Dweller$16,9884.5% under 228238Rolex Day-Date 40$63,67536.9% over 126300Rolex Datejust 41$9,00211.3% under 79000NTudor Black Bay 54$3,89913.5% over 126334Rolex Datejust 41$12,2669.5% under 126610LVRolex Starbucks$15,69513.7% over 116610LVRolex Hulk$21,89515.9% over 126300Rolex Datejust 41$10,9958.3% over

COSC chronometer

COSC (Contrôle Officiel Suisse des Chronomètres) is the Swiss institute that tests movements over several days, in different positions and temperatures. A movement that passes, keeping within -4 to +6 seconds a day, can be called a chronometer. Several brands add their own stricter tests on top.

See also

Master Chronometer

All glossary terms