Home / United States / World War II / Metal Insignia / WWII U.S. Public Health Service Ambulance Officer Sterling Pin Back Collar Insignia WWII U.S. Public Health Service Ambulance Officer Sterling Pin Back Collar Insignia$40.00 Approximately 3/4 of an inch square in size. The insignia has the letter “A” affixed to it. WWII U.S. Public Health Service Ambulance Officer Sterling Pin Back Collar Insignia quantity Add to cart Item Number: 33062 Category: Metal Insignia