RAF flying helmet receiver, type C

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.  Minor surface wear, scratching to main casings and covers/caps.  Nice and clean internally.  One single receiver only.  Remarkably difficult to find now.  Stock code H18816A.