1863 5c rose, left sheet margin single, tied on piece by undated "Catamarca" postmark, v.f. (Cat No. 7C) (Image)

Est.$250

1899-1903 5p orange and black, center inverted, well centered with wide margins, fresh color, h.r., v.f., with handstamp guarantee on back, only 50 printed, cat. $2750 (Cat No. 140a) (Image)

Cat. $2750, Est.$2,000

1964 Universal Postal Union (XVth Congress) special presentation album (green leather binding with gold embossing) with 6 imperforate blocks of four in various colors, v.f. (Cat No. C93P) (Image)

Est.$500

1923 (31 Dec) flown cover from Buenos Aires to Montevideo by English pilot Shirley G. Kingsley, with 1 January arrival pmk, fine, with 1994 Aerophila certificate (Image)

Est.$500

1925 (7 Mar) First Flight Buenos Aires to Rio de Janeiro, cover franked with Brazil 200r (misperforated single), tied by special oval cachet, specially prepared "Voyage d'Etude Lignes Aeriennes Latecoere" envelope, fine, with arrival pmk. A rare cover, one of only 10 carried on this flight (Image)

Est.$500

1944 National Anthem, 5c+50p souvenir sheet, n.h., v.f., cat. $425 (Cat No. B11) (Image)

Cat. $425, Est.$250