Tachometer, Chronometric, Type C-11, WWII Air Force US Army Japanese small Arabic numerals indicated the

small Arabic numerals indicated the odd-numbered hours

This is a matched set of dual engine Torque Pressure / BMEP Indicators

This one has a serial number prefix of AF-45

seeking North

after which it is only necessary for him to "range and track" the enemy plane

Tachometer, Chronometric, Type C-11, WWII Air Force US Army Japanese small Arabic numerals indicated theHere is an example of the WWII era Chronometric (i. e. mechanical) Tachometer, Type 11, as used by single engine aircraft of the Air Force US Army. According to the US Army Air Force Maintenance Interchangeability Chart dated Feb 1945, the C 11 tachometer was used in fighters P 40 Warhawk (E N), early versions of the P 47 Thunderbolt, and P 51 Mustang, dive bombers A 35 Vengeance and A 36 Apache, and transports UC 61 and UC 64A. This tachometer has a