Hello: I realize that this thread is at least a year old, but maybe I'll can pick up some information here. I purchased a Kodak Monitor, #3794, lens #6400. It might be a 1939 model as it doesn't have the CAMEROSITY date code on it, & I've heard that the date codes didn't start until 1940. Anyway, the shutter is good, & the bellows are dark, everything seems good. I loaded it with a trimmed 120 roll of Ilford FP4+ with a 620 take-up reel. It started ok, but I'm suspecting that the film/paper is not, at times, turning the little sprocket that turns the frame counter. I still have to finish the roll, but if my suspicions are correct, the film will run out before the frame counter shows "8". Is there anyone out there in the ether that has experienced this with a Monitor? What did you do to remedy it? I'm thinking that perhaps a spacer, foam or ?, in between the film/paper & the pressure plate, right where the sprockets are, might aide in the film/paper to consistently turn the frame counter. Or not. Does anyone have any ideas? Thanks. -Rich Reeder, Mesa, Arizona.