Mamiya 120 6x7cm Pro S film back for RB67 zinc Unsure what makes this "Tri":

Unsure what makes this "Tri": There's a top compartment (measuring approximately 14x14x24cm) and a bottom compartment (about 15x22x26cm) but I'd assume a third compartment to complete the count

This Olympus Auto Bellows is a versatile 5-piece rail system that you can use in at least three ways: As a macro bellows

If you like simple cameras

The Gossen Luna-Pro is a good quality meter with excellent low light sensitivity and an easy to read dial

It’s unclear why they called this projector a “Grand Prix” except that it’s made out of the same colour and texture of plastic as a 1960s Pontiac interior

Mamiya 120 6x7cm Pro S film back for RB67 zinc Unsure what makes this "Tri":This is a 6x7cm format 120 film back for the Mamiya RB67 series of cameras. This Pro S version is compatible with all RB67 models. In very good cosmetic condition, with light surface wear. Film tested, working well.