Vintage 1980's Purple Sweater with Abstract Design

This vintage sweater is in excellent condition. It is a fun purple colour with geometric abstract patterns and a contrasting black colour. There is no fabri tag but it definitely feels like a mohair wool. The buttons are gorgeous. There is no size tag but this is about a medium based on the lay flat measurements which are as follows: pit to pit 21.5 in sleeve length 23 in total length 27 in shoulder to shoulder 21 in Ribbed detail at the cuffs and hem shoulder pads