U.S.A. (1985) Rural electrification*. Misperforation resulting in bottom of stamp appearing at top. Scott No 2144.
AVAILABLE AT $40
U.S.A. (1983) Charles Steinmetz*. Nikola Tesla*. Horizontal misperforation causing the se-tenant pair to be split in half. Scott Nos 2055,2057.
AVAILABLE AT $100