My father has recently bought a Mamiya C33 with standard 80mm lens set. All of the information I can find states that the C33 (and later C330) had automatic shutter cocking with the film advance. However, this one does not. Does anyone know if perhaps there was some changeover period between the C3 and C33 where cameras were marked up as C33 but had C3 mechanics? There are no signs of anything missing so it is a bit of a mystery at the moment. Thanks, Steve.