Pilots' Information File USAAF May 1945 P-2 Neptune The B-7 unit was used

The B-7 unit was used in the US Army Air Force fighters P-38E Lightning

At the top of the compass is a rotatable glass lens with parallel line markings and degree markings around its perimeter

a "Y" on the bottom of the temperature scale moves left or right

Both have been painted on the outside glass with the operating limits of the aircraft in which they were installed

as used in aircraft of the Japanese Navy

Pilots' Information File USAAF May 1945 P-2 Neptune The B-7 unit was usedHere is a WWII era Pilots' Information File published by the US Army Air Force with revisions through May 1945. It contains the essential information on the duties and responsibilities of the pilot. It is in very good condition given its age. It has some wear on the cover but the pages in intact. Measures 8. 5 x 11 inches, and ~0. 5 inches thick.