Compass, Magnetic, Type B-20 Vertical Card, WWII, US Army Air Force Vulcan and comes in its original

and comes in its original box

This C-2 was made by Pioneer

it has a knob to adjust for barometric pressure

a microphone trigger switch

Compass, Magnetic, Type B-20 Vertical Card, WWII, US Army Air Force Vulcan and comes in its originalHere is a WWII era Type B 20 Direct Reading Magnetic Compass, made by Autoflight, part number 2221. The B 20 Compass design is unique in that it contains a magnetic horizontal float suspended in damping fluid that engages the directional pointer on a vertical compass card to display direction. The pointer indicates the direction of aircraft flight. The knob in the lower left corner manually rotates the course indicating pointer (i. e., the two