Vintage Porsche Racing Jacket Windbreaker large

Vintage Porsche Competition Racing Black Jacket Windbreaker Sz Large ZIP Up. Condition is preowned no rips or tears. There are a few light white stains I tried to wash them in a regular cycle and they didn’t come out, it may be paint but I don’t want to damage the jacket. Please see pictures. Embroidered spellout on the sleeves. Armpit to armpit 23.5” Shoulder to hem 28”