We're not sure when this advert dates from – going by the look of it we'd guess sometime in the 70s – but we think the real question here isn't "when" but "WHY?"
As you can see from the text, the purpose of the nipple bra is to allow you to have "that sensual, no-bra look while wearing a bra". It was "the very first bra to have its own built-in nipple" and provide that "cold weather look" all the time.
Yes, that'll definitely get your guy's attention. We'd love to see the look on his face, though, when you take off your top to reveal THE NIPPLE BRA!
Why did this not catch on?