Horsepower Indicator, -500 to 5000 HP, Allison Engine US Coast Guard (see photo of instrument panel

(see photo of instrument panel

but is frozen in position in this specimen and may be able to be repaired

as there are no scratches or wear marks

This is a Carburetor Air Temperature Indicator for a dual engine aircraft as used in the C-46 Curtiss Commando Transport aircraft of the US Army Air Forces during WWII and through the 1950-60's by the US Air Force and civilian operators

Aichi E13A Type Zero Reconnaissance Seaplane aka "Jake"

Horsepower Indicator, -500 to 5000 HP, Allison Engine US Coast Guard (see photo of instrument panelThis 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.