comprising a Rank Mamiya, silver, body F-G, shutter cocks but blades don't open, meter responds to light, rangefinder works, a Petri Computor 35, black, body F-G, shutter cocks but blades don't open, meter, rangefinder works, a Yashica Minister-D, silver, body G, shutter cocks but blades open slowly, meter not responding to light, rangefinder works, and a Petri 7-S, silver, body G, shutter cocks but blades don't open, meter responding to light, rangefinder works,