These next two are from the 1957 and 1959 Jantzen catalogue. I adore the womens swimsuits but I'm not so sure about the mens - especially the tucked in shirt!
The final two have been great educational material for me. The first photo on the left is advertising 'Lastex' swimsuits. In the 1950s this was a new type of stretchy fabric which beacame popular for making swimwear. The second one on the right describes different names for the swimsuits which include ' Silver Goblet', 'Cheetah', 'Sea Mist' and 'Silver Foil'. If I was ever lucky enough to come accross any of these swimsuits I would know their name!