Ammeter, DC, Dual Engine, Weston 827 Type 28Y1, C-121 Lockheed Constellation PV-1 Ventura The 1958 Flight Manual of

The 1958 Flight Manual of the Lockheed C-121 Constellation shows these instruments located on the pilots instrument panel as well the flight engineer's panel

Not yet confirmed

indicating vertical speed from 0-3000 ft/min

Here is a 1940's vintage electrical Free Air Temperature Indicator

testing would be required to confirm accurate operation

Ammeter, DC, Dual Engine, Weston 827 Type 28Y1, C-121 Lockheed Constellation PV-1 Ventura The 1958 Flight Manual ofThis 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.