Picked this guy up at work, my employer made me a good offer. Heres a quick picture of the front and back. Now I know I can use a polaroid back because it just slides into whatever a standard 4x5 sheet holder will slide into. But I'm curious about the possibility of a roll back ( not that I would ever really need one , except on a 2-1/4 x 3-1/4 graflex), since the back does not seem to be a graf-lok (spelling?) back where the ground glass can come off completely like I've seen on some speed graphics and such. The camera says its a Crown Graphic (Serial # 955297), has a synchronized rangefinder (I assume it works for all lens if I pull the lens board upto the two notches poped up on the rails), a Graflex Optar f/4.7 135mm lens, with a (X) Synchromatic "Made by Wollensak for Graflex Inc". Shutter ranges from T,B, 1 to 400. Also do they have adapters to go from the two prong to PC-sync style flash sync cable? But ya, now I shoot almost everything from half frame 35mm, 35mm, 120 (6x4.5, 6x6, 6x7 and 6x9),and now 4x5.