Simple device to reload 35mm films. For example you need to test new camera/lens/film and don't want to shoot all 36 exposures. You can make 3 rolls of 11 exposures each, out of 36mm cassete.
It's especially usable if your film is not available in bulk spools or if you don't want to buy whole spool.
Print roughest settings available for your printer. Black material, 2 or 3 perimeters to make it light tight.
The author hasn't provided the model origin yet.