I have an Omega Constellation C-Case 168.017 from 1966. I don’t wear the watch everyday, so I wind it when I don’t wear it so I don’t have to reset the time when I do.

I’ve noticed that when I wind the watch while it’s still ticking, I will gain/lose time. For example, 5 minutes slower or 20 minutes faster.

Does anyone know the reason for this?

Many thanks for any replies

 

Are you saying that in the few seconds that you are winding the watch using the crown, the hands can advance up to 20 minutes?

That makes no sense...please post a video of this happening.

 

Sorry I hope this makes more sense.

So I’ll wind the watch and put it back in my draw, the time stays the same. I’ll come back say 6 or so hours later, and the time will have advanced/dropped.

 

When was the watch last serviced?

 

Not sure ... I took the watch to a watchmaker to get one of the gaskets changed, and he said it was keeping good time. Might be due for one! Thank you for your response.