Size M vintage Liz Wear white beaded sweater cardigan yellow stain spots on back

M210...19, 21, 20 13oz Size M vintage Liz Wear white beaded button front short sleeve sweater cardigan yellow stain spots on back Flat laying measurement shoulder 19, armpit 21, length 20 inch Button front, 100% cotton Has yellow stain spots on the back: 3 small spots close to back collar, one large spot close to left sleeve