Altimeter Type B-11 20K Ft, Air Corps US Army US Coast Guard speed between 0-200 knots is

speed between 0-200 knots is read on the outer pointer arrow clockwise along the outer perimeter scale

The top of the case is marred from adhesive tape

published in 1944 by the US Navy Bureau of Aeronautics

but the unit is in otherwise in exceptoinal condition given its age

A fuel tank selector switch was mounted on the panel above this indicator

Altimeter Type B-11 20K Ft, Air Corps US Army US Coast Guard speed between 0-200 knots isThis 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. ACUSARMY is imprinted on its face, for Air Corps US Army. Altitude was indicated from 0 100 ft by