Military Study Reels consist of 7 different range and attitude (tilt angle) images of a plane. These reels were issued to military personnel during World War II, for recognition and range estimation of both enemy and friendly aircraft.

Study Reels (S+Number) contain recognition of different angles of the same plane, while Test Reels (T+Number) test one s knowledge of recognition of different planes.

Condition:
 Reel:
excellent condition in plain unprinted sleeve