Navy Aviator Sweetheart Chain Pin and Lieutenant Rank Pins on Card field I particularly like the mechanical

I particularly like the mechanical man diagram for breathing

The rings are moved to the side to insert coins an then pushed down to secure them

This style seems to be the more common wartime one

The ribbon bars are: American Defense Service Medal

German hangers which have been branded Heeres - Eigentum

Navy Aviator Sweetheart Chain Pin and Lieutenant Rank Pins on Card field I particularly like the mechanicalVintage WWII US Navy sweetheart jewelry insignia pin set. The chain pin has the Navy Aviator wings and the Navy officers emblem. There are also two second lieutenant rank pins. The card is torn by the navy aviator wings pin. The card also has creasing and pencil writing on the back.