In unbelievably short time I have just heard back from the manufacturer but with fairly limited information about my vintage watch. This watch dates from 1958 production and the movement is a Peseux 333 SC 11½ ''' (ie a P 333A). That is apparently the limit of their archive on this item. At least I now know the lift angle is confirmed at 52º and the power reserve is 44 hours, thanks to Ranfft's web site. Still very good time keeping and seems to have settled on-the-wrist of +4 secs/day. And the watch very easily friction hacks. Not bad for a 58 years old watch!
Best
Clive