7 sets 1930s brown bakelite door handles lock key hand plate art deco lever knob bakelite handle sets like these would have been fitted to internal wooden doors with mortise locks. The door handle sets measure approximately 204 mm (8) long, 64 mm (2 1/2) wide backplates, the lever handles are 100 mm (3 15/16) long, and knobs 45 mm (1 3/4) square.