Manifold Pressure, Dual, Set for 4-Engine Aircraft, AN5770-2, D-11 Vickers and D (Dull) are displayed

and D (Dull) are displayed on the inner ring

Normal 0 false false false MicrosoftInternetExplorer4 This is an authentic WWII-era quad-tank Oil Quantity Indicator made by Liquidometer

part number 40091 with a manufacturing date of May 1965 for an order by the US Air Force

This is Mach Speed Indicator

The knob turns the compass card when depressed

Manifold Pressure, Dual, Set for 4-Engine Aircraft, AN5770-2, D-11 Vickers and D (Dull) are displayedHere is a set of WWII era AN5770 2 (formerly D 11) Dual Manifold Pressure Indicators, as used in four engine of the US Army Air Force such as bombers B 17, B 24, and B 29 and transport C 54. The indicator marked for engines 1 & 2 was made by Ranco with a 1943 manufacturing serial number prefix. The indicator marked for engines 3 & 4 was made by American Meter with a 1944 manufacturing serial number prefix. These were also used in twin engine aircraft