U.S.A. (1960) Water* dropping off leaf*. Water reservoir*. Perforation shift resulting in the inscription at the bottom appearing at the top. Scott No 1150. Yvert No 684. 7th Watershed Congress.
AVAILABLE AT $30
U.S.A. (1981) Rachel Carson*. Vertical misperforation in pair cutting the right side of each stamp off. Scott No 1857, Yvert No 1317.
AVAILABLE AT $75