Vintage Unmarked Rare Chevron Hidden Stitch Sweater No size/brand

Vintage Rare Unmarked Navy Blue and Ivory Chevron-patterned Hidden stitch Knit Sweater No size/brand or fabric material tag Sweater is heavy and hidden stitching beautifully made. Please use measurements for proper fit in gently used condition Measurements taken with item laid flat Armpit to Armpit 19” Shoulder to Shoulder 20” Sleeve Length 27 1/2” Neck 5” Length 22”