Ok the thoughts from my watchmaker/mentor and my coments back to him in red
check the beat, he says that the beat is correct
check magnetism, could be how would this make it run faster though unless a coil on the unrue was touching
check the Balance spring, is round and not touching
if you have problems with the clutch(train) the movement would be in the right time but the hands are slower, I agree
It is possible a Spring winding is connected the beat rises up and the watch goes forward.
it looks being correct in time and it is correct but in the wrong beat.
I keep thinking that if the movement was the older beating at 21600 and you put a balance out of a newer one beating at 28800 what would happen??????????????????
Nomad just to correct you there the speedy moon rep come with sapphire, i have done conversions from sapphire to plexy
The sapphire i have here is from a moon watch and the it is 31.42mm with out the retaining ring
O.T. well i think it is on topic but i get them from a supply house here in Germany, real comfortable and at a decent price of about €20 plus postage, only available in 18 and 20 mm though, brown, red brown and black, also moo crock print if you want it. I am putting in an order with them tonight if you want one.