Hello Out There! We have come across a box of AG education films that are in the'Super 8mm Sound Film Cartridge' format-evidently a technology whose time has come...and gone! We have no way of checking or viewing these films,but they do seem to be in relatively good condition .Some were sold by an 'A.O. Smith Harvestore'.We were able to learn that this sound cartridge format began in 1975 and was 'dicontinued recently'.We were able to find what the projector looks like but little else. We wonder if there is any value to the cartridges as we were considering selling them,any help would be appreciated.Some of the titles (there are 10 in all) are Why Bale Hay,At the Touch of A Button,Grow Your Own-Beef Version,Beef Feeding Systems,Total Ration For Dairy,etc. Thanks!!!