I purchased a Contessa Nettel that arrived today. It came with a Graflex 3 1/4 x 4 1/4 wooden film holder and one side has a sheet in it. Of course I didn't know that, so I exposed the bottom 1/2 in. I have access to C-41, E6 and B&W processing equipment, but don't know which one to run it in. Either C-41 or E6 will wipe it clean if it is B&W. So the question is what is your experience with this size film? What is the likely hood of it's format?