zOwie Omega Discussion Forum

I have a beautiful vintage 1960 Omega Constellation with automatic certified chronometer movement that has been working very well for the past 5 months that I've owned it. I had it serviced right after I got it, as a "base point" and to deal with a stiff crown (it made it difficult to manually wind the watch, which does need to be done periodically--apparently I don't move my wrist enough during the day).

Just recently, I noticed something peculiar: As I was observing the second hand moving around the dial, I noticed it moving erratically--meaning, it wouldn't "tick" uniformly across certain parts of the dial. It would "skip" and "stall" at various points. This does not seem to affect the time keeping (it's quite accurate to losing/gaining several seconds a day depending on resting position).

Is this a sign of the movement suffering some kind of failure? I find it hard to believe, given the recent servicing. And yes, I had looked closely at the moment several times before--I would have noticed this if the problem was always there, as I have a very good eye. Is it something I should have looked at, or should I wait for "further failure" to go the next step?

One other thing I'm thinking of... is there any chance my manual winding has introduced this? That maybe some second-hand gears have stripped? I wind it about once every 5 days or after letting the watch run down completely (about once a month). I don't go nuts... I just turn it about 6 times or so.

Thanks for any advice...