Hi Fonty,
More information re the S.P. It gets better, next week i finally get to see the bike you kindley helped to identify from the limited information i had been given.
The update is all of the paintwork has been painted white,wheels and all but the Vin/Chassis number is MC 21 1012238, REGISTERED in the U.K on the 16.08.91.
So, could even be a Pentax ?
Regards