The Pentax S1a body is a sold mechanical film SLR camera with a metal chassis. Very robust. Basically a K1000 with screw lens mount and slightly slwoer top speed of 1/500sec. The camera has manual exposure modes with shutter speeds from 1sec to 1/500sec. As its one of the very first 35mm film SLRs, certainly from pentax there's no electronics or exposure system/batteries. You can buy a dedicated add on meter or use a handheld meter. There wasnt a flash shoe originally but this has the optional add on. There's a sync socket for X and B type flash, and a tripod mount. The shutter button is threaded to accept a cable release for long exposures with the B-setting and there's a T setting. Good solid camera that's idea for student or traditionalist.
slight knock on pentaprism front, scruffy baseplate, grubby top plate. Most will clean up. Full working order. No fungus on lens., aperture blades free from oil.