: I have a Seamaster Pro 300M for three years now
: and wear it daily. For 12 hours each day,
: it's on my wrist and the other 12 hours,
: it's in the winder...replaced by my Suunto
: Observer. Recently, I've notice that my
: winder only spins for approximately 8 secs,
: every 15 minutes(guess the motor is getting
: old). For the 12 hours it's on my wrist,
: it's accurate within 1 sec. After putting it
: in the winder overnight, it's -30 seconds
: off. I know my winder should be spinning
: longer for each interval, but since it is
: getting some activity, shouldn't my watch
: still be more accurate? I figure a little
: winding, is better than nothing. Even before
: I started using the winder, my watch was
: still only losing -2 second a day sitting on
: the dresser. I've also made sure it's fully
: wind manually too. Any suggestions or ideas?
Based on what you've described I can only assume that your winder is bad. If you have fully wound your watch and wear it for 12 hours a day, you really don't even need to use the winder. Since it runs well within COSC specs while off the winder but runs outrageously far out of spec on the winder, it seems logical to conclude that the winder is the source of the problem. I'd just stop using it all together and see what happens. Perhaps the motion of the winder has become more "jerky" over time as it the motor has started to fail?
If you hadn't mentioned fully winding the watch, I would have suspected a low power reserve. Timekeeping becomes poor as a watch gets down to the bottom of its power reserve, but if yours is fully wound, then this doesn't seem to be the case.
Good luck,
John
