Swimwear, 1928.
Playwright George Bernard Shaw surfing at age 75 in 1931 (via Surfing Heritage)
This fits to the one I reblogged from Churchill.
Girls Gone Wild 1924
http://www.shorpy.com/node/6171
May 7, 1924. “Three models from Washington’s spring fashion show snapped at Arlington Beach.“ National Photo Company glass negative.
I believe the year is 1937.?