Bob Shell
I found this in the back room of my studio the other day. It's a kit
I got ages ago to shoot panoramic images on my Pentax 6 X 7. I never
got around to using it. It uses spool adapters to fit two 35mm film
cassettes into the camera so you have cassette to cassette feed and
no need for film rewind. The kit includes spool adapters, metal
frame mask for inside of camera, plastic viewfinder mask for focusing
screen, plastic case for whole kit, and full instructions. I'm
asking $ 100 including fast shipping in the USA. I'll ship anywhere,
but buyers outside the USA need to consult me for shipping quote.

