I have just purchased the Trona 212 by Ica. It seems to be operating fine, aperatures change size, speeds vary according to a change in setting, sidways tilt is ok, vertical tilt is okay, ground glass is okay.
But what does it use for film? I have the film back with a tin metal removable piece, the back of the film holder pops open and there seems to be a spring metal pressure thing to keep the film pressed against the back of the camera. But what film, plate or sheet?