rare MOD YES NIGHTGOWN 60's 70's S

Mod-era novelty nightgown (late 60's/early 70's)! Bright red nylon, silky and not sheer. White "YES", with the Y integrated into the neckline. Ruffle hem comes up on the sides (picture 6). Tag on the inner side says "Aristocrat", and tagged as size M. Runs a little more like S by today's standards (mannequin is a US size 4, model in first picture is a 6). This measures 36.5" at the bust, and it's 32" long. Excellent condition!