Engine Gage Unit for US Army Air Force Fighters, 1942, Type B-7, AN-5774-B B-29 It has a serial #

It has a serial # prefix of AF49

according to their flight manuals from the 1950's

This antenna was typically positioned atop the fuselage and behind the cockpit

and the PBY5A Catalina Seaplane (which used 2)

The controller is experienced but a fine artifact

Engine Gage Unit for US Army Air Force Fighters, 1942, Type B-7, AN-5774-B B-29 It has a serial #The US Army Type B 7 Engine Gage Unit was used across a variety of aircraft of the US Army Air Force during WWII. In particular, the B 7 made by Manning, Maxwell, and Moore part number 6548 73 15 was used in fighters P 38 Lightning, P 39 Airacobra, P 40 Warhawk, P 47 Thunderbolt, and P 51 Mustang, according to the US Army Air Force's Maintenance Interchangeability Cross Reference Chart dated Dec1943. This example is marked AF USARMY on its face and