Mach Speed Indicator (Machmeter), Mk 3A, Ref 6A/3300, RAF Carvair according to the Maintenance Interchangeability

according to the Maintenance Interchangeability Chart dated Feb 1945

Our example is yellow-tagged as serviceable

As the aircraft climbs

or banking left or right

This example has been installed in an aircraft during its service life

Mach Speed Indicator (Machmeter), Mk 3A, Ref 6A/3300, RAF Carvair according to the Maintenance InterchangeabilityThis is a fine example of a Cold War era Mach Speed Indicator Mk 3A Ref 6A 3300, as used in aircraft of the British Royal Air Force. The indicator displays aircraft mach speed from 0. 7 to 1. 3 mach. The serial number indicates a year of manufacture of 1958. The indicator is also marked with K. M. A. 0201K, likely a part number. The RAF Air Ministry arrow emblem is marked on the rear case. The adjustment screw at 6 o'clock position moves a white