Just for fun, some bathing suit advertisements through the years:
First up: Jantzen, 1939
And Jantzen again, from 1945 this time:
Cole of California, 1961:
J.C. Penney ad from 1970, they were just "Penney's" back then:
And one more from 1970, from Label 4 Jrs:
Ready to go swimming yet??