(Gun & Powder) "King" Air Rifles. Multicolor illustrated design on 1906 cover showing Boy with "King" Air Rifle, franked with 1903 2¢ tied by Kansas City, Mo. machine cancel, reverse with attractive multicolor all over advertising showing Crossed Air Rifles; slight cover reduction at right, Very Fine, a wonderful & rare design. Estimate  $150 - 200. $0 (Image)