Has anyone see a 7750 ETA/Valjoux movement that had a sweep second hand for the chrono that had a jittery movement? I just received a brand new auto chrono from an AD that has a rough sweep second hand. It seems to stall then move a little faster to catch up. It seems to still complete the 1 minute cycle on time but looks terrible while it is doing it.
Any thoughts? other experiences?
Oh by the way it is being exchanged for another piece, I just want to know that it will not be the same in the next one.