Vintage Jacket

Vintage jacket from late 70's or early 80's. Excellent condition! Tag says M, but fits like a women's small. Lined inside. - pit to pit 20" - bottom band stretches from 14"- 16" - length front 19" - sleeve length from top shoulder seam 24.5" - size M but fits like a women's small PLEASE NOTE: Small 1/2" mark on the back of left sleeve, see last pic