Grey Messori Button Front Bomber Style Jacket, Size Medium, Made in Italy

Men's grey Messori button front bomber style jacket / cardigan, no size tag but appears to be a medium. Made in Italy. Has wear on the inside collar (see photos) and a mark on the left sleeve (see photo). There also appear to be some random white marks on the front and on the sleeves (see photos). Priced accordingly. It was just too nice of a jacket to discard. Maybe you know how to clean it up.