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The Master Control 1000 Hours test..

May 12 2003 at 7:04 AM

Jaw  (Login TJN)

Most of you probably know, but just in case, I wish to describe briefly as to what is tested in the process (COSC test in bracket):

The first thing is that the Master Control 1000 hours (COSC 360 hours) test is carried out only when the watch is fully assembled, including casing, hands and dial, not just the movement (COSC, movement only):

(Test carried out and how it is recorded)

Accuracy must be within the range of -1 to +6 seconds per day (COSC -4/+6 for Gents and -5/+8s for Ladies)

Power Reserve Test:
under intense activity and when in low activity simulation (COSC not tested)

Functions and aesthetic inspections and test (COSC not tested).

Knocking test for the balance (COSC not tested)

Accuracy under normal and fully wound. Test in 6 positions and in cyclos (COSC 5 positions, normal condition only)

Water resistance test at least 5 ATM (COSC not tested)

Shock Resistance test with 20,000 small simulated shocks (COSC not tested)

Resistance to thermal variation between 4 degrees to 40 degress centigrade (COSC 8 to 38 degrees centigrade)

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