ANSWER It's 110 Film ! This cartridge-based 16 mm wide film was used during the 70’s to take still-frame pictures. Kodak invented this cartridge in 1972 to fit in their Pocket Instamatic cameras. These baby’s were easy to load, taking away the hassle of loading and unloading the roll- all you had to do was drop the cartridge into the camera, close the back door, wind and get to shooting! These cameras were great for those who wanted to take photo’s recreationally, and were basically fool-proof. You could even open the camera with half exposed film inside and the film would still be protected inside of the cartridge! The demise of this cartridge was ultimately due to its difficulty in printing the images taken on anything larger than 5x7 prints.