Cabin Pressurization Rate of Change Selector B-50 KC-97 US Army The procedure is changed from

The procedure is changed from Take-off to Landing and vice versa by rotating the knob in the lower left

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

This offer is for the combined pair

Journal of Navigation

See the photo of the interior

Cabin Pressurization Rate of Change Selector B-50 KC-97 US Army The procedure is changed fromThis 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