WW2 Royal Ordnance Factories National Industrial Mobile Squad badge

A very scarce original circa 1941 wartime period 'National Industrial Mobile Squad badge'; gilded brass oval example bearing 'Board of Ordnance' shield, the reverse with maker's details "T.L.M. Ltd B'Ham" and official low issue number "375". Very good condition, retaining original buttonhole fitting, enamel intact, very minor stress lines, gilt remains bright.
Height 26mm.

'Royal Ordnance Factories National Industrial Mobile Squad' were experienced staff from the older munition factories, who acted as advisers and trainers to the workforce in newly created Engineering Royal Ordnance Factories. The majority of the volunteers came from Woolwich, Enfield and Nottingham.