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

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

from left to right on the panel

The first and longest indicated 100's of feet

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

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