Byers A4 Film Cutter  type_Continuous Lighting The spring in the viewfinder

The spring in the viewfinder hood for the magnifier cover is weak

and should hold most 35mm SLR cameras

This would be a pretty useful accessory if you wanted to use a Viso lens on a digital camera with an LTM adapter

plus a zippered front pocket for accessories

Byers A4 Film Cutter &nbsptype_Continuous Lighting The spring in the viewfinderThe Byers A4 Film Cutter is designed for making single frame cuts of 35mm film. In good working order, with some cosmetic wear, and minor corrosion on a few screw heads. Manual or automatic advance. For some reason, the designers of this machine put the trigger button on the same side as the blade so do pay attention when in use.