See below for the AI suggested description! I bought this film back for my Wista field camera bacause the Horseman one I had previsouly was too fat. I've included a coule of pictures of this mounted on the Wista and a Zero large format pinhole. 

I've run a few films through this, works a treat. 

The Calumet 6x7 roll film back Model C2 is a high-quality accessory designed specifically for 5x4 cameras. Tested and in good condition, this roll film back allows photographers to easily attach and securely hold medium format 120 film, providing a convenient and efficient way to capture stunning images. With the Calumet brand known for its reliability and durability, this accessory ensures that photographers can trust in the quality of their photography equipment to produce exceptional results.

Posting to the UK only.