Ammeter, DC, Dual Engine, Weston 827 Type 28Y1, C-121 Lockheed Constellation PV-1 Ventura The MC-125 Tuning Unit is

The MC-125 Tuning Unit is a component of the WWII-era airborne communication system Receiving and Transmitting Command Set SCR-AJ(and AL)-183

This Recognition Light Control Assembly appeared in a number of US Army Air Force aircraft of WW2

testing would be required to confirm accurate operation

indicating vertical speed from 0-3000 ft/min

Ammeter, DC, Dual Engine, Weston 827 Type 28Y1, C-121 Lockheed Constellation PV-1 Ventura The MC-125 Tuning Unit isThis is a dual DC Ammeter, 0 450 amps, 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 MJB 1 control panel from the C 121 flight manual dated 1958. This instrument has a date stamp of 1957. Measures 3. 25 inches diameter and 3 inches deep.