Mistaken For Cine Film. Old audio tapes look like cine films

We sometimes receive old reel to reel audio tape which is mistaken for cine film. This is easily done as the reel sizes match those of cine film. Here is a photo of what the customer thought was a 7 inch 400 foot reel of old cine film. Note there are no images on the tape surface, just pure brown.

cineuser