Tachometer, Chronometric, Type C-7, WWII, Air Corps US Army Bf-109 Item shipped may not be

Item shipped may not be identical to item pictured here

The periscope of the sextant would be inserted through a shutter mount in the top of the cabin to obtain a reading

by showing increments of quarter fractions from 0 degrees (Up) to fully extended 45 degrees (Down)

There is a "0" above an "A" at center position flanked by a "L" and a "E" to the left and right of the scale

The rubber cushion inside of the case has deteriorated and softened

Tachometer, Chronometric, Type C-7, WWII, Air Corps US Army Bf-109 Item shipped may not beHere is an example of the WWII era Chronometric (i. e. mechanical) Tachometer, Type 7, as used by early single engine aircraft of the Air Corps 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