It is a screw in the finder. there is a U shaped bracket that holds the left and right plates that also acts as the hinge. 2 screws hold it, one of mine fell out somewhere. Attached is a pic of the problem I am having.Other than that it is in decent shape. I picked up a C22 body from fleabay for the WLF to replace this one (I think I paid a whole $20 for it with shipping) and found the camera is in good, though dirty, shape. It needs seals and new leather, both are on the way. Will be nice as a backup and studio camera when done but that dang old screw......