Finished work on this at the weekend. It's a mens National Semiconductor module put into a dead PII. It's my first attempt and it seems to be working great so I'm quite pleased with it.
Incidently that's one of Olivier's (Compuchron's) time screens on the watch and it actually looks much nicer than in the photo.
Here's the module before everything was tidied up and glued into place. Took it with a mobile phone so apologies for pic quality. The white wires go to the battery connections on the base. One end of the reed switches goes to the donor module the other end to the PII case, then put a new quartz on it and off you go...
(Ed - First time I've put any pics up - if these are too big then let me know and I'll resize them. DB).