Tachometer, Mk V, US Navy 88-I-2500 Pre-WW2 Measures 12 in x 6

Measures 12 in x 6

thus changing its position with relation to the rest of the instrument

The glass and case are intact and the lettering is distinct

part number 6531-1L-B

The keying switch is stiff

Tachometer, Mk V, US Navy 88-I-2500 Pre-WW2 Measures 12 in x 6This is an original WWII era electrical aircraft Tachometer, Mark V FSSC 88 I 2500, as used across aircraft of the US Navy, such as the SBD Dauntless Dive Bomber, TBM Avenger Torpedo Bomber, and F6F Hellcat Fighter. Pioneer Bendix part number 2222 IF2 A. Range 0 3500 RPM, with the pointer indicating RPM hundreds and the inset window at 9 o'clock indicating RPM thousands. This tachometer is in exceptional condition given its age. Measures 3. 25 inches