Sixty years. These have held up well. Oh, I did love the Everly Brothers; never got too excited about Elvis, although "All shook up" was #1. You hear some folk songs which enjoyed a brief popularity, and the rise of rock and roll. My parents didn't have TV, so I only knew these through the radio, and we learned them without being attached to something with ear buds. My parents' automobile didn't have a radio, so. . . I must have been listening at home or at parties. Kids have their ways.