Mens vintage 1950s Mary maxim Shawn collar flying bird knit cowachin sweater

Mens Mary maxim Shawn collar flying bird graphic knit cowachin sweater from the 1950s. Amazing vintage condition. Missing the tag and size guide but fits like a medium. See measurements for same. Measurements taken laying flat : 21.5 inches Waist - 21 inches Sleeve length- 28 inches Length 30.5 inches Size Medium. Long sleeves but can be rolled up.