1962, 50th Anniversary of Portuguese Scouts, 50c multicolored, imperforate single with inverted black color, no gum as issued, NH, VF and very rare, reportedly only 35 produced, two reference articles included, Est. $800- $1,000 (Image)

1939-40, New York World's Fair, double green overprint on 4½t ultra, excellent centering and post office fresh, full OG, NH, VF and very rare, only 25 stamps were printed, Sanabria and Kessler guarantees, a common stamp with red overprint (1900 printed) is included (LH), Est. $3,000-$4,000 (Image)

1936, black overprints or surcharge ''Aviao'' on 2a-15a, complete set in sheet margin blocks of four, a few marginal separations, full OG (slightly dried on 5a/6a brown), NH, VF, C.v. $230 as hinged singles (Image)

1938, Airplane over the Globe, inscribed ''S. Tome'', 10c-10e, complete set of nine, full OG, NH, VF, C.v. $256 as hinged (Image)