Eastman Kodak negative frames

Two antique Eastman Kodak contact printing frame for 3 1/4 X 5 1/2 inch negatives. Nice picture scenes were added at some point a long time ago. This appears to be a pre-Maskit form of the frame which is to say pre-1917. Overall, it is handsome and sturdy for the age, but wood and metal are scuffed and discolored. The insert measures 3 3/4 X 6. Outside 4 3/4 X 7.