Aldis Signal/Spot Light Kit and Lenses Ref No 5A/823 RCAF 1940-43 KC-97 This Shellback certificate is unique

This Shellback certificate is unique because it was from the US Navy's first aircraft carrier

made by the British aircraft instrument manufacturer Smiths

The Master Indicator was part of a 5 module system combining the functions of a directional indicator and a magnetic compass

Here is an early WWII-era US Navy aircraft Pelorus Drift Sight

It indicated outside air temperature from -45deg to +45deg C

Aldis Signal/Spot Light Kit and Lenses Ref No 5A/823 RCAF 1940-43 KC-97 This Shellback certificate is uniqueHere is an original WWII era Aldis Signal Light Kit as used by the Royal Canadian Air Force. The light was used either as a spotlight (by squeezing and holding the large trigger) or as a signal light (by squeezing the small trigger, which altered the angle of the projected light) to transmit Morse code. Atop the light housing is a tubular sight to ensure that the light is aimed at the intended recipient to ensure accurate interpretation of any Morse