Vintage Yves Saint Laurent Textured Wool‎ Blend Black Cardigan Size Large

Vintage Yves Saint Laurent Textured Wool Blend Black Cardigan Size Large Elegant black women's sweater with a classic design. Perfect for any occasion. Preowned condition- functional buttons and totally wearable but there is some kind of stain on the front button shown in pictures. It almost seems like a glue. I have no idea how to remove it or if it can. It’s not super noticeable and it’s still a really beautiful cardigan. There is also some light piling from use. See pictures for specifics Shoulder to hem: 30 inches Pit to pit when the cardigan is buttoned up: 18 inches