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 to main casings. Covers / caps fitted are actually from later type 16/32 receivers. Very good clean condition internally. Remarkably difficult to find now. Stock code H25908A.