1934, "Portugal", 1/2a-20a, set of ten imperforated plate proofs in horizontal pairs, printed on paper with watermark "Maltese Cross", no gum as produced, NH, VF and scarce unit

750.00

1964, 400th Anniversary of the Company of Jesus in Macao, unissued 10a multicolored, set of four stamps, background and denomination in various colors, completely flawless condition, full OG, NH, VF and extremely rare, only a few such sets possible, Yang #10a, no price indicated

1936, "Portugal", black overprints or surcharge "Aviao", complete set in sheet margin blocks of four, dried original gum as always exists, NH, VF, C.v. $230 as hinged singles

75.00

1940, New York World's Fair, green overprint on 50a red brown, two singles, one of which has inverted overprint, full OG, NH, VF, 2,000 stamps were issued with a common overprint, and only 25 were produced with inverted one, made this stamp an undoubted worldwide airmail rarity, expertized by S. Wolf