I recently got hold of simplex 35mm suitcase projector. Everything looks to be intact. I've been searching online for a manual for this projector but haven't had much luck. There isn't much information on the projector other than it was made in the 1930s and the serial number. I should also add that it is a sound projector. Does anyone know where I can get some kind of literature on this projector? I just want to make sure that all the pars are there and get more information on it.