SOUTH WEST AFRICA (1975b) Black eagle*. Imperforate proof pair from margin of sheet with color bars. Scott No 374, Yvert No 348.
AVAILABLE AT $175
SOUTH WEST AFRICA (1975c) Martial eagle*. Imperforate proof pair from margin of sheet with color bars. Scott No 375, Yvert No 349.
AVAILABLE AT $175
EL SALVADOR (1963) King Vulture*. Set of 4 imperforate progressive proofs printed on glossy paper and originally affixed to an archival sheet (number 695), labelled "Direction Général des PTT - Archive des Timbre-Poste Suisses et Étrangers. These proofs are from the archives of Courvoisier S.A. and represent the issued set. Scott No C200, Yvert No PA181. Quite possibly a unique set of proofs. Sismondo photo certificate.""
AVAILABLE AT $325
AUSTRIA (2019) Sea eagle*. Black print. Europa series.
AVAILABLE AT $15
AUSTRIA (1953) Buzzard*. Black print. Scott No C58, Yvert No PA58. Scott catalog value of regular stamp is $100.00 and of course the black print is much scarcer!
AVAILABLE AT $200