Radio Compass Indicator I-81-A of SCR-269-G and AN/ARN-7 Bf-109 The glass for #1-2 needs

The glass for #1-2 needs cleaning from the inside

equipped with twin J-34 engines

This heavy 8 inch metal calculator was first used during WWII in bombers such as the Lancaster

1-2000 lb bomb

Radio Compass Indicator I-81-A of SCR-269-G and AN/ARN-7 Bf-109 The glass for #1-2 needsThe I 81 A Radio Compass Indicator (aka Pilot's Bearing Indicator) is a component of the Radio Compass SCR 269 G system (which evolved into the AN ARN 7), used during WWII. According to the Airborne Radio Equipment Handbook of the Air Service Command dated 1943, this system appeared in versions of the US Army Air Force bombers B 17, B 24, B 25, B 26, B 29, and transports C 46, C 47, and C 54, as well as in any models of these aircraft used by the US