U.S.A. (1966) Frank Lloyd Wright*. Guggenheim Museum*. Misperforation resulting in name appearing at the bottom instead of the top of the stamp. Scott No 1280, Yvert No 794.
AVAILABLE AT $12
U.S.A. (1973) Jefferson Memorial* and signature*. Scott No 1510. Yvert No 1008. Perforation shift. The inscription of the country name and face value now appear on the top. **. Hard to find!
AVAILABLE AT $15
U.S.A. (1973) Jefferson Memorial* and signature*. Scott No 1520. Yvert No 1008a. Perforation shift and miscut in coil pair. **. Superb!
AVAILABLE AT $40
U.S.A. (1973) Jefferson Memorial* and signature*. Scott No 1520. Yvert No 1008a. Superb error: miscut and imperforate coil pair. **. Unlike France, the United States does not intentionally print imperforates for each issue.
AVAILABLE AT $65