About 18 months ago I got a 6x9 -54 roll film back from EBay sold as “not working”£27.50 - Last week I thought I would get it out and have a play to see what’s up and maybe fix? It’s a Wista branded back which I already have a couple of so I knew what it is supposed to work like .. fiddle fiddle run test film through - several times . OK yes it’s faulty but I think I can put up with a faulty lever wind spring that does not return - good result for me.