This Burton film holder holds two pieces of 3 1/8 x 4 1/8 inch sheet film--one on each side. The bottom flap has black photographic tape sealing the contents from light leaks. Each side has a removeable plastic slide with a metal top edging. Inside each side of the holder the back wall is coated with a black anti-reflective light coating.
Stamped into the wood surface along one long edge of the holder: BURTON MFG. COMPANY, INC. CHICAGO