True vintage 60s Healthtex check button down shirt size 3 EUC

Darling red and navy windowpane check short sleeve button down shirt by Healthtex Stantogs size 3 circa 1960s or earlier in excellent condition. Three tiny pearl buttons up the front. Open collar. Front patch chest pocket. Cuffed sleeves. Boxy silohuette. No content label - feels like a soft woven cotton or cotton blend. Please use provided measurements for sizing and fit. Tiny menswear just like Dad’s! Unisex and absolutely adorable. Mad Men Mid century Mid century modern Mid century American 60s Tiny menswear Classic