This is a vintage Boy Scouts of America Explorers shirt. Not sure of the exact year I am guessing 60-70's. Encino Calif patch on sleeve. Size 17 which is a Large or XL. Underarm to underarm 25". Inside label says Boy Scouts of America Official Shirt Little Or No Ironing Required. There are the initials DW in ink on the label. Patch front pockets with official Scout button closures. Poly/Cotton made in The USA