During the Second World War, filmy stuff like nylon was reserved for military use. This situation did not, however, create a sudden craze for bare legs. Instead, you had scenes like this:
And admittedly, “no more ladders,” “ladders” being a Briticism for “runs,” has an appeal of its own. I’m assuming that the price includes scribing a line down the back to create the appearance of a seam, which was the rule back them. (And if that price is indeed sixpence a pair in sterling, forty women could be so adorned for a pound, which during the War was pegged at $4.03 US.)
Of course, there were always do-it-yourselfers:
And really, it’s no sillier than contemporary self-tanners, though you can’t really tell from the B&W photography if there was a tendency toward orangeness.