I just bought a great wrap dress from the late 70s from a vintage shop, which had been taken in in two darts at the back, I thought to make the bust smaller; and I figured, as a larger busted person, that I'd just take them out. So I just did and the back ( a lowish plain curve) sacks out by a long way, to about three inches down the back. The bust did increase slightly and now fits just right. Was this an actual style or have I just bought a duff dress and should put the darts back in?
Really so if people give me a funny look I can smile knowingly and say, oh this was a popular back style in '76!