Vintage WWII Era Sweetheart Empty Portrait Sterling Silver Pin

Vintage WWII Era Sweetheart Empty Portrait Sterling Silver Pin Gold vermeil sterling silver early 1940s WWII era sweetheart portrait pin Soldiers would wear these with a miniature portrait photograph of their 'sweetheart' Portrait frame is empty inside. Marked sterling in 2 places on the back of the pin C clasp closure Has vintage patina and scratches consistent with age. Measurements/sizing info in photos