Directional Gyro, Italian Royal Air Force (Regia Aeronautica Italiana), Filotechnica Sperry Air Forces of USA Note the Italian SM 579

Note the Italian SM 579 Torpedo Bomber & the FW 187 that was never operationally deployed yet identified by US military intelligence as 'in production'

This is an electromechanical Ammunition Reserve Counter

a)  no response (if the Safety Plug has not been inserted)

including heavy bombers B-17 Flying Fortress

B-17 Flying Fortress

Directional Gyro, Italian Royal Air Force (Regia Aeronautica Italiana), Filotechnica Sperry Air Forces of USA Note the Italian SM 579This is an exceptional example of a WWII era Giroscopio Direzionale, made by Filotecnica Sperry in Milano Italy, was used in aircraft of the Regia Aeronautical Italiana. This was likely made by Filotecnica under license from Sperry, but the precise history of the manufacturing source is unclear. On the dial there is text which reads "Scade Radium 15 9 43", which essentially translates to Radium Expires 15 Sep 1943. Therefore the instrument was likely