19-12-2004, 10:27 PM
emnet er har været oppe adskillige gange både her og på så at sige alle urforaer verden rundt! Det er absolut indenfor Chronometer certificeringen, se nedenstående for specifikationer:
Each Officially certified COSC Chronometer is unique, identified by a serial number engraved on its movement and a certification number given by the COSC. Each movement is individually tested for 15 days, in 5 positions, under 3 different temperatures. Based on these measurements, 7 eleminatory criterias are calculated, the minimas of which must all be met e,g, for movements of a diameter over 20 mm, indicated in seconds/day:
Average daily rate: -4 +6
Mean variation in rates: 2
Greatest variation in rates: 5
Difference between rates in H & V positions: -6 +8
Largest variation in rates: 10
Thermal variation: +-0.6
Rate resumption: +-5
Mvh THomas BEch
Each Officially certified COSC Chronometer is unique, identified by a serial number engraved on its movement and a certification number given by the COSC. Each movement is individually tested for 15 days, in 5 positions, under 3 different temperatures. Based on these measurements, 7 eleminatory criterias are calculated, the minimas of which must all be met e,g, for movements of a diameter over 20 mm, indicated in seconds/day:
Average daily rate: -4 +6
Mean variation in rates: 2
Greatest variation in rates: 5
Difference between rates in H & V positions: -6 +8
Largest variation in rates: 10
Thermal variation: +-0.6
Rate resumption: +-5
Mvh THomas BEch
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