Part no. Engraving was machined and polished off, there are a few light scratches on it which could polish off further. I've had this for more then 10 years, had it fitted to a cal 321 Speedmaster which of course would not have been on the moon, hence the removal. Included is the rubber gasket required in order to stop the movement from rattling. Might take you 2 or 3 tries to get it so it does not show in the see through back. Either that or buy the correct spacer movement holder. I would like £200 plus shipping of your choice.