Nikon DB-2  type_Radio Remote with the Maxxum logo that

with the Maxxum logo that Minolta was using until Exxon asked them to please stop

This is a 6x6cm format 220 film back for the Bronica SQ series of cameras

as long as you don't need a built-in meter

4x boost to focal length

there are a few front element coating marks which do not affect imaging

Nikon DB-2 &nbsptype_Radio Remote with the Maxxum logo thatThe Nikon DB 2 is an anti cold battery holder for the Nikon F3, FE FM series, the FA, and others. Just screw in the cord where the batteries would normally go and pop a pair of AA batteries into the holder. In addition to extended battery life, you can toss the holder into a warm pocket and minimize the effect of extreme cold weather on the function of your battery powered camera.