Cowl Flap Position Indicator, Bendix Magnesyn, C-121 Lockheed Constellation P-51 The cover can be removed

The cover can be removed to reveal the gyro inside

the indicator appears as item 12 on the right side of the panel

and the internal mechanism can be removed to reveal the electrical gyroscope

the Consolidated B-24 Liberator

as appeared in aircraft such as the Grumman S2E Tracker and Lockheed P2V-7 Neptune Antisubmarine Warfare aircraft (according to their flight manuals

Cowl Flap Position Indicator, Bendix Magnesyn, C-121 Lockheed Constellation P-51 The cover can be removedThis is a dual Cowl Flap Position indicator as used in the US Air Force C 121 transport version of the Lockheed Constellation. See photo of the location of the instrument on the Flight Engineers upper instrument panel from the C 121 flight manual dated 1958. It has a date stamp of Dec 1956 on the side case. Measures 3. 25 inches diameter and ~3 inches deep.