Cabin Pressurization Rate of Change Selector B-50 KC-97 US Army prompting a left/right turn towards

prompting a left/right turn towards the station

It consists of a small 'telescope' viewing vertically towards the ground

See diagram of A4D-1 instrument panel from its flight manual dated 1962

such as versions of fighters P-38 Lightning and P-61 Black Widow

A wooden brace is temporarily installed across the face

Cabin Pressurization Rate of Change Selector B-50 KC-97 US Army prompting a left/right turn towardsThis offer is for a vintage 1950s Cabin Pressurization Rate of Change Selector made by Airesearch, which appeared on the engineers panels of the US Air Force Boeing B 50 Bomber and KC 97 Stratotanker. It has two overhaul date stamps, 1969 and 1972. See photos of the diagram and descriptive text from the B 50 Flight Manual. Both measure 3. 25in diameter and ~6in deep. The dial markings are clear and the glass and case are intact. It is in exceptional