zOwie Omega Discussion Forum

: What is the normal break-in period for an Omega
: Chronometer? Also, does winding vs. wearing
: cause greater deviations in accuracy? Can
: wrist movement slow or speed the movement
: vs. being stationary?

: Thanks in advance for your responses.

my new smp300 was working inside the chronometer specs right from the start. however it is not unusual for new watches to need a few months to reach a steady state performance. if after that period your watch's accuracy is still unsatisfactory take it to omega.

the advantage of an automatic (vs handwinder) watch is that the spring is continously being wound by its rotor (assuming you wear the watch) and thus dipenses a more or less equal torque on the gear train which leads to better accuracy. if you move the watch (move your wrist) for the rotor to fulfil its function you do not have to wind it. if you have not worn your automatic and it stops wind it 20-40 turns - this will fully wind the spring to start with and lets the rotor do its job thereafter.

a hindwinder's spring will slowly unwind (until the watch stops or you wind the spring again) which feeds the movement a variable momentum which may lead to slightly worse accuracy.

hope this helps.
best regards
markus