This is a vintage sterling silver World War II Air Raid Patrol (ARP) badge. The badge is hallmarked with a lion passant, leopard's head and a C which dates to 1938 London, I believe. It also has a maker's mark of J C. The badge measures 1-1/2 inches long and 1 inch wide. It weighs 9.9 grams. I am not certain how the badge hooks on but it might fit into a buttonhole. The badge is in very good condition but does have an age patina and may need cleaning or polishing. Please let me know if you have any questions. Thanks for stopping by.