Published by the Air Ministry in July 1941. Instructional recognition silhouette or 'spotter' cards for 1941. 'Orange' pack - silhouettes of multi-engined aircraft (twin rudders). Complete pack comprises 53 card with four distinct/separate views of each aircraft, plus a joker, and the four views represent 'suits', and are as follows: 'General perspective view'; 'Front view'; 'Plan view'; 'Side view'. The Joker shows three or four views of each aircraft on one card. Comes with a photocopy of the 'key' sheet dated July 1941. Marked 'For Official Use Only'. The cards cover allied and axis aircraft and are in very good condition whilst the box is a little worn. Stock code P18237.