WW2 Home Guard Invasion Defence home front lapel badge

A good original wartime period small oval brass badge inlaid with dark blue enamel 'H.G' to centre surmounted by a red enamel King George VI Crown. Good condition, complete with original buttonhole fitting, no damage to the enamel. Height approx 23mm. Formed in 1940, from the recently raised Local Defence Volunteers (LDV), to counter the threat of invasion from German airborne and seaborne troops (Hitler's 'Operation Sea Lion').