Circa 1950s - many would simply call this a bullet bra However, this example by Hollywood Maxwell used the trademark whirlpool because of the company's proprietary spiral stitching on the cups.

Download (23MB) - Northumbria Research Link

Final product (maybe) for my sister's 70s themed birthday party! : r/VintageFashion

Recreating the Hollywood Maxwell Whirlpool Bra

A Cat is a Puzzle for which there is no Solution - ART FLAIR

A History Of The Iconic Bullet Bra – The Endless Night

Marilyn invited to April in Paris Ball by Elsa Maxwell to keep

Elon Musk #201 - Elon Musk v

Lucky score. Finally. 97' Taz 95' betty b : r/VintageFashion

Lingerie Misc. bras — Original adverts and images

Final product (maybe) for my sister's 70s themed birthday party! : r/VintageFashion

Recreating the Hollywood Maxwell Whirlpool Bra