This listing is for a vintage paper advertisement. This is a 1956 ad for a Thompson Products Intake Valve, Sodium cooled exhaust valve with Charles Lindbergh! The size of the ad is approximately 8.5x11inches. The caption for this ad is 'Spirit of St. Louis flies again.. With Thompson Valves' The ad is in great condition. This vintage ad would look great framed and displayed! Add it to your collection today!