A very interesting peripheral for large format cameras with Graflex mount: with this magazine you can expose 6 film sheets in succession without having to deal with cassette changes. In principle something like a revolver cassette that you can pre-load - has some similarity to the pack film cassettes for Polaroid, except that the films here are not bent, but rather pushed backwards inside the cassette through the click-clack process.
Particularly cool: you could adapt these parts to other cameras. I at least have the option of such an adapted cassette for my Polaroid 600 SE.
Update: I won the auction on eBay. Let's see what I get now.