Perhaps not as vintage as some, these are dated on the verso in 1973, they are nonetheless great images. And that water that's scintillating like a David Hockney pool is not, in fact, in a swimming pool, that's the sea! and the nearly featureless surface over which they are swimming is simply the clean sand at the bottom of the sea. Who, in the early 1970s had an underwater camera to take their holiday snaps with...?!