Bulk Loading Film
/The device above is called a “bulk loader”. The big round bit at the back is where you put a big spool of film (best to do this in the dark). You then close off the film storage area and open the light-tight hatch to load an empty 35mm cassette. Then you close the hatch and wind 24 shots of hopefully unexposed film into the cassette.
It’s a way of recycling old film cassettes and saving money on film, as film in bulk is a bit cheaper to buy. I’ll let you know whether or not it works when I’ve run a film through the camera and developed it….