WW2 Home Front - AID Badge No 7958

The Aeronautical Inspection Department (AID) was formed in December 1913 for the purpose of inspecting aircraft and other supplies for the Royal Flying Corps (RFC). By 1939 AID was an engineering organisation, mainly civilian, but in part RAF, whose prime purpose was to ensure that all RAF and RN equipment manufactured or repaired by contractors and by RAF maintenance units was constructed to approved designs and was fit and serviceable for issue to the users, the operational and training units of the RAF and RN. This is the larger and rarer badge measuring 25mm in diameter.