RUSSIA (2006) Base station*. Imperforate proof sheet of 25 stamps with color bars and printed title. Antarctic Exploration.
AVAILABLE AT $100
PERU (2004) Machu Picchu base station*. Map of King George Island*. Imperforate pair. Scott No 1451. Only 2 proof sheets exist!
AVAILABLE AT $160
AUSTRIA (2022) 150th anniversary of North Pole expedition*. Black print of S/S.
AVAILABLE AT $15