I have noticed something strange with my Citizen NY2300 (miyota 6200), as any automatic it runs a little bit on a very regular +7s/day (I log the deltas with excel) so from time to time I have to move the hands backward.
If I only move the hands backward, the watch runs quicker, irregularly, from +10 to +25s/day ! I discovered that if I move the hands backward but much more than necessary, at least 10 minutes, then slowly forward to reach the wanted time, the watch is as accurate as before !!!
I have done this 3 times, over a 4 weeks pediod.
any explanation ?