Hedy Lamarr, Esther Williams, Gail Russell, Tallulah Bankhead, The cast of "La Piscine" : Romy Schneider, Alain Delon, Jane Birkin, Maurice Ronet... (via), Brigitte Bardot.
A bigger splash (3) : http://dsata.blogspot.fr/search/label/swimming-pool
The Saturday Evening Post [v210 # 9, August 28, 1937] cover by John La Gatta