Vintage wool knit sweater jacket

I am not sure if this is wool or not, but by the feel of it I believe it is. There are no tags. The only flaw I could find was a stain on the lining inside the jacket. It is pretty heavy and will keep you warm. Fully lined. There is no size, but I will leave measurements below. Measurements: Armpit to armpit: 16” Length from top of shoulder down: 23” Length of sleeves measured from under armpit down: 17.5”