The other day, I noticed that my second hands was stuck at a time when it had to clear both the minute and hour hands at the same place. I reset the chrono's and noticed that now, it's a little crooked. The tail lines up perfectly at 6 o'clock but the the arrow is now over at the 1 second mark. I tried to cheat and stop the sweep hand at 12 but now the register at 3 is obviously 1 second ahead!! And, the tail is slightly off.
How does this happen?