Altimeter Type B-11 20K Ft, Air Force US Army UH-1 the operating ranges for each

the operating ranges for each parameter are labeled in green/red on each scale

Measures 5

so it was likely used in a USN aircraft

This is a hard copy reprint of the original WWII-era Pilots Manual for the P-38 Lightning Fighter published by Aviation Publications

US Army Air Force Type D-3

Altimeter Type B-11 20K Ft, Air Force US Army UH-1 the operating ranges for eachThis is a WWII era Sensitive Altimeter displaying aircraft altitude from 0 to 20,000 feet. The Type B 11, made by the Bulova Watch Company, was used in a variety of aircraft during early WWII with a maximum performance ceiling below 20,000 ft. This altimeter has a serial number prefix of AF 43, indicative of a year of manufacture of 1943. See spec sheet. Altitude was indicated from 0 10,000 ft by the long pointer along the outer scale. As the aircraft