Stores reference 10A/7063. 'Receivers, telephone, head, type C' as used with the Type B flying helmet and Type D oxygen mask. Manufactured in plastic/bakelite moulded over a steel shell with a separate screw on bakelite cover. Surface wear, scratching/small cracks to main casings. Covers/caps absent and threads corroded. Dirty and slightly corroded internally. The two screws that secure the wiring loom are absent in one receiver. Remarkably difficult to find now. Stock code H12310.