Boy Scouts Group Scoutmaster lapel badge Collins London

A scarce original early pattern 'Group Scoutmaster Officer's lapel badge', brass circular example inlaid with green white green striped enamel, with yellow 'Boy Scout' motto scroll and an applied red arrowhead with stars; the reverse impressed with maker's details 'COLLINS LONDON'. Good condition, minor defects to red enamel. Diameter approx 18mm.