Vintage Crochet open cardigan in pretty blue with chevron pattern short sleeves

Really pretty blue in cotton crochet short sleeved cardigan. Mostly open with one central button. Chevron pattern looks like handmade! Mint condition no flaws. Fabric and care tags removed. All cotton hand wash or wash in bra bag and lie flat to dry. Armpit to armpit buttoned 25” and shoulder to hem 29”nice length no short.