1940's WWII US Army 'sweetheart' jewelry.
Sweetheart jewelry first became popular during World War I, as a means of connection between wives, mothers and sweethearts back home and the men fighting overseas. It was one of many things that soldiers either made or purchased, along with pillowcase covers, handkerchiefs, compacts, and the like.
 
- US Army emblem lucite pendant
 
- US Air Force engraved silver forget-me-not bracelet
 
- US Army engraved silver forget-me-not bracelet with 10k gold plating