Calumet Roll Holder Model C2 (6x7)  type_Bags and Cases but they'd run out of

but they'd run out of their usual material to make shutter curtains

it has a tiny LED light which is apparently for video

which is really handy with some of the long minimum focus distances on Hasselblad lenses

and suitable for use on most Nikon cameras or F-mount adapters

the video output

Calumet Roll Holder Model C2 (6x7) &nbsptype_Bags and Cases but they'd run out ofThe Calumet Roll Holder C2 is a rollfilm back for 4x5 cameras designed to slip in front of the groundglass like a sheet film holder unlike most rollfilm backs that require partial disassembly, causing a condition known as "pain in the butt." This back shoots 10 6x7cm frames on standard 120 rollfilm. In excellent condition, with minor cosmetic wear.