Heavy worker's arm for a long right above elbow stump

Heavy worker's arm for a long right above elbow stump. Blocked leather socket with metal elbow dome reinforcement. Metal upper forearm section with heavy-duty, hand-operated bolt lock, set on the inner side of the elbow. Two-knob wrist rotary (for old style stem fitting - 3/4" x 3/8") The large ball-headed 'pin' on the wrist is for release of the terminal device and the small 'pin' is the rotary lock. The pulley, at axillary level, is for a leather operating cord which passes through it and then through the eyelet on the elbow flexion lever before terminating at the wrist. This cord together with the harness appendages, hand and lower forearm section are missing as patient failed to attend for delivery of this prosthesis. N.B. The earlier type of Steeper adaptor, with long stem, is fitted into the wrist rotary. Made by Steeper in 1962.