I did notice recently that the time was out sometimes when I wear the watch after a full wind up. When i investigated further i didn't notice anything at first but i checked this on more occasion as it became clear loosing time was not a once off.
I noticed when you turn the watch on its side (to the left as you have the watch face facing towards you...which is where it will reside a lot if you wear it on your left wrist) that the fastest moving pendulum cog stops moving, it gets stuck. Once you face the watch towards you again (parallel to the floor) it begins swinging once again. 
This is extremely obvious when you see it.