Watch Chronometer Certification parameters by COSC

Average daily rate: -4/+6 seconds / day
Mean variation in rates: 2 seconds / day
Greatest variation in rates: 5 seconds / day
Difference between rates in Horizontal & Vertical positions: -6/+8 seconds / day
Largest variation in rates: 10 seconds / day
Thermal variation: ±0.6
Rate resumption: ±5 seconds /day

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