Turn and Slip Indicator, Mk IA, RAF 1937 PBM-5 Mariner has a rotating disk with

has a rotating disk with Pioneer and numbers on it for us as a course reminder

but it is an exceptional artifact from WWII

These were made by Bendix and Magnavox

The compass pointer is slightly sticky as it rotates

We are speculating that this is from a fighter aircraft of the 1950s or 1960s

Turn and Slip Indicator, Mk IA, RAF 1937 PBM-5 Mariner has a rotating disk withHere is an exceptional specimen of a Turn and Slip Indicator, Mark IA, invented by George Reid (according to the 'all knowing' Wikipedia) and made by Reid & Sigrist, as used on the blind flying panel of aircraft of the British Royal Air Force and the Royal Australian Air Force of WWII. It is an early version as evidenced by the all white markings; later versions had both white and green markings on the face. While the Mark IA was used across numerous