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GMT, Worldtimer, GMT Chronograph
Operating instructions2
Chronograph functions
(calibre 3603 – fig. XXIII, calibres 9605, 9615 – fig. XXVII)
• Pusher A : start – stop, start – stop, etc.
Timing to within 1/8 of a second for up to 12 hours.
• Pusher B : reset (after stopping).
Note: the chronograph function must always be stopped before the
zero resetting function is used. Never push the chronograph’s two
pushers (A and B) simultaneously (calibre 3603).
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