93329M Beattie D-56 Split 70mm 100' Film Back for 67M Camera - This back uses 70mm film. The image area is 2.5 x 1.7" (6.4x4.3cm).
100' precision cast aluminum film backs are secured with an easy on/off mechanism. They all feature a 3-digit film counter and can be used with daylight load spools or darkroom load cores. A signal from the film back disables the camera and triggers a warning light when the supply runs out. The film can be cut and removed in changing bags with partial use of the roll.