Vintage Pale Yellow Collared Sweater CMH Heli-Skiing Canadian Mountain Holidays

Vintage yellow CMH collared half button down pullover sweater. Missing size and materials tag. Shown on a size small mannequin. I think this would fit a womens size medium to large. Feels like a cotton poly blend. Asymmetric zippered pouch on front. Mixed fabric on pouch and sleeves. Some wear from use and age. -Armpit to armpit is about 22.5" across when flat -shoulder to hem is about 22"