Illustrated below is a mounted US Navy medal group with a Good Conduct medal named to Everett D. Johnson, 1942. The medal also has a "Second Award" bar, (pin back version) and three stars  which indicates that he enlisted in 1939 and stayed in the navy until 1954 or later. Next medal, the American Defense ribbon has one battle star as does the Pacific Campaign ribbon which makes me think this might be a Pearl Harbor grouping. No battle or campaign stars were authorized for the American Defense Service Medal but it was not unusual for survivors of the Pearl Harbor attack to wear a bronze battle star on the ribbon of their ADSM on their own authority!