Compass, Magnetic, Type B-20 Vertical Card, WWII, US Army Air Force Vulcan This C-2 was made by

This C-2 was made by Pioneer

then the larger pointer indicates RPM around the outer scale from 50-110%

it has a knob to adjust for barometric pressure

Both operate as they should mechanically

and by the USAF as the Low Altitude Bombing System

Compass, Magnetic, Type B-20 Vertical Card, WWII, US Army Air Force Vulcan This C-2 was made byHere 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