Rollex rollfilm back

image by uwekulick (Image rights)

Rollex made rollfilm holders (film backs) fitted with a dark slide, designed as adapters to use 120/620 rollfilm with 9x12 or 6.5x9 plate cameras, resulting in a 6x9 image (or smaller with a mask insert).

View of opened filmback showing component parts image by Nicholas Middleton (Image rights)