70s pointed collar short sleeve shirt 1970s vintage

70s pointed collar short sleeve shirt 1970s vintage pointed dagger collar blue & brown windowpane plaid left chest pocket made in the USA Brand Royal Knight preowned vintage condition, some discoloration, snags on back (pictured) Tag Size Medium Measurements laying FLAT 23.5” Pit to Pit 18” Shoulder seam to shoulder seam 9.5” Top shoulder seam to end of sleeve Length 28.5” front/ 30” back Shipping weight 4.5 oz