WW2 and 1936 - 1952 King George VI cypher transfer. Reproduction waterslide transfer  3" x 4". As used by fire, police and no doubt other services on fire buckets, tool boxes, first aid tins and indeed anything you want to make look official. Some police forces had them on truncheons and GPO messenger motorbikes had them on the leg guards. Artwork taken directly from an original example.