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

Condition:
Buff front, white back reel,  with proper plain sleeve (no printing).   Scattered remnants of dark dis-colored dye spots in the background, barely noticeable in standard viewers.