Quote:
Originally Posted by lennywilkins
Sounds like they did nothing with the watch.
Insist on the watch being regulated to within -2/+2.
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They could regulate on a machine to -2+2 seconds but on the wrist could be slightly different as there are many many variables.Remember this the escapement of a mechanical watch in 24 hours pushes the gears 432,000 times and a day has 86,400 seconds, so even 3.8 seconds is not life threatening.Now on the wrist the movement is constantly affected by the earth's gravity,mainspring power-reserve, metal expansion and contraction, temperature variations, subtle changes in lubrication and friction, shocks, and so on.The fact is that no mechanical watch made will keep 100% perfect time, very close yes but perfect no.