1948, 3¢ Salute to Youth Issue. Tied by "Washington D.C. Aug. 11, 1948" cancel on Dorothy Knapp multicolored cacheted First Day cover, attractive design depicting boy and girl on a hill with school and trees in background, fresh and Very Fine, a rare and desirable design. Scott No. 963  Estimate $750 - 1,000. $0 (Image)