Altimeter, Mk XIIIB, 0-20,000ft, British Royal Air Force A-30 It is in reasonable condition

It is in reasonable condition given its age

according to an attached tag dated May 5

This is a rare opportunity to own an instrument that was in all likelihood made specifically for the largest piston-engined aircraft ever mass-produced

or for that B-50 that you are building in your garage

not gallons

Altimeter, Mk XIIIB, 0-20,000ft, British Royal Air Force A-30 It is in reasonable conditionHere is a British Altimeter (Height Indicator) Mk XIIIB as used in pre WW2 aircraft as well as aircraft during WW2, with a maximum ceiling of 20,000ft. It has the original crown symbol of the Air Ministry on the back. The knob rotates the face of the instrument to correct the scale. According to the Royal Australian Air Force 346 Types and Locations of Instruments dated 1945, this indicator was used in the Avro Anson, Supermarine Seagull V, and Short