Did she go into the water with this suit? It looks to be wool and mighty stretchy. In fact, maybe she knit it herself. Note that the straps on left and right appear to be two different widths. The texture is pilled, perhaps indicating that the wool was not the highest quality.
I’m dating this photo to the early 1930s, given the style of the swim suit. Of course if she made it herself, all bets are off. Other elements in the picture—the granny glasses, the sensible shoes, the wall tent–have a very long life span.
Since swim suits at the time were largely made of wool, many crafty women knit them up for themselves and their families. Looking on line, I was amazed to discover the wide range of patterns for women, men, and children. I am not a skilled knitter and the thought of making such a skimpy garment, especially one designed to get wet, seems like a risky proposition.
Let’s take a minute to admire just comfortable this woman is in her own skin. Truly a happy camper.