Altimeter, Spain, late 1930's, Marconi Espanola, Askania, Fuerzas Aéreas de la República Española B-25 and the Boeing B-29 Superfortress

and the Boeing B-29 Superfortress

if the thick pointer was at 80

I have also confirmed its use in the P-2E by its parts manual dated 1966

Radio Magnetic compass

The indicator is in exceptional condition for its pre-1943 age (the year the Air Corps US Army became the Air Force US Army)

Altimeter, Spain, late 1930's, Marconi Espanola, Askania, Fuerzas Aéreas de la República Española B-25 and the Boeing B-29 SuperfortressHere is an Altimeter, to 6,000 meters, made by Marconi Espanola under license from the German instrument manufacturer Askania. Very similar to the Askania FI22306 circa 1936. Based upon information from a warbird fan in Spain, it appears to have been used in the Hispano Aviation HA 1112 "Buchn" fighter used during the Spanish Civil War. See image of a Buchon panel in gallery.