Tachometer, Chronometric, Type C-11, WWII Air Force US Army Japanese after which it is only

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

It is a hand held finder used to ascertain the range of an enemy aircraft based upon its known wingspan

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

with two clamping screws

small Arabic numerals indicated the odd-numbered hours

Tachometer, Chronometric, Type C-11, WWII Air Force US Army Japanese after which it is onlyHere 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