Mamiya 120 6x7cm Pro S film back for RB67 zinc The upper pan control moves

The upper pan control moves a full 360 degrees smoothly and the bottom has pre-determined stops that are adjustable with the knob inserted into the side

This is the adapter only: cables are not included

manual-diaphragm M42 lens- not even a preset system on this one

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

Mamiya 120 6x7cm Pro S film back for RB67 zinc The upper pan control movesThis 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.