I've been offered a large bellows camera (Argyle 18) that was left in an office building. It is mounted to a base on two rails and has knobs that move the rear of the camera or the lens forward and backward only. In front of the lens is a glass covered frame that folds and locks either horizontally or vertically and appears to be for holding something to be copied. Someone said it is for enlarging and advertising but gave no details. It looks to me like a camera to photograph papers or posters to enlarge them. Is this thing worth anything or should I refuse it. He plans to trash it if I don't want it. It looks in good condition and has everything including lights mounted on each side of the frame.