Tachometer, New Old Stock PN 656K-03, P-51, P-47 Douglas The manual for the sight

The manual for the sight can be viewed at ibiblio

Across the inside of the ring are two horizontal

Maximum Allowable

C and D versions

~8 inches deep

Tachometer, New Old Stock PN 656K-03, P-51, P-47 Douglas The manual for the sightHere is an authentic original WWII era Electrical Tachometer Indicator Kollsman part number 656K 03 (US Army Type E 9), as used in US Army Air Force fighters P 38 Lightning, P 39 Airacobra, P 47 Thunderbolt, P 51 Mustang, and P 63 King Cobra. This specimen is New Old Stock and was received by Aero Antique in its original sealed carton dated November 28, 1944, and we are the first to have opened it since then. The Army type E 9 tachometer indicator