King George VI & Queen Elizabeth 1937 Coronation tin button royalty badge

A scarce and unusual '1937 Coronation souvenir celluloid tin button badge' displaying patriotic coloured crossed Union Jack and White Ensign flags with two oval photographic portraits of 'King George VI & Queen Elizabeth' inscribed 'Coronation 1937'. Very good condition, complete with original pin fitting, minimal foxing, colours remain bright. Diameter 22mm.