Horsepower Indicator, -500 to 5000 HP, Allison Engine US Coast Guard Mounted within the ball turret

Mounted within the ball turret at the right foot of the ball turret gunner (see photo)

as there are no scratches or wear marks

and on the B-29 it was installed on the flight engineers instrument panel

with a service stamp of Oct 1968

a component of the 1950's-era Smiths Military Flight System

Horsepower Indicator, -500 to 5000 HP, Allison Engine US Coast Guard Mounted within the ball turretThis is a Horsepower Indicator, displaying HP from 500 to 5000 HP at 100% RPM. This was manufactured by Hickock Electrical Instrument Co., part number 560 422, also labeled with an Allison Engine part number 6734355A. Measures 2. 25 inches diameter and ~3 inches deep.