WW2 Royal Air Force war workers numbered identification badge

A scarce original wartime period 'Royal Air Force badge'; gilt brass oval example, the centre bearing Crowned RAF eagle above a tablet with officially impressed number '18134', the reverse with maker"s details 'J.R.Gaunt. London'. Very good condition, complete with original buttonhole fitting.
Height 33mm.
Worn as an official identification for civilians 'On Government Work' serving on RAF Airfields, etc.

Code: 66628