I bought this Kodak Instamatic 133-X camera in a charity shop today. When I looked at it in the shop, I could tell it was heavier than usual, but couldn’t see a 126 film cartridge through the little window on the back. When I got home, I discovered someone had cut the top off of a 35mm film and tried to use that!
No idea if they just gave up when they realised it was the wrong type of film - or maybe it was a spy, and they hid the film in there for me to discover. I will take it in and see if there is anything on there, but I doubt it has even been exposed.