JOHN BLAIR MENSWEAR 1970’s navy polka/dot print point-collar shirt! Size M!

JOHN BLAIR MENSWEAR 1970’s navy polka/dot print point-collar shirt! Size M! Polyester print in navy with beige and grey dots. Long sleeve and point collar and top button at neck is missing. Amazing 70’s shirt. Super Groovy! Size medium - but would be a men’s small in today’s sizing as chest width flat from SS to SS measured 1” below AH is 29-1/2” so has a 39” chest circumference. Thanks!