1965, New York World's Fair, 30f green and orange, center is inverted, perforated and imperforated complete sheets of 20 (4x5), the last one with fold at bottom right corner did not affect the stamps, full OG, NH, VF

1965, New York World's Fair, 40f carmine and bright green, center is inverted and shifted, also proof of central design only and a common stamp, all are in sheets of 20 (4x5), full OG, NH, VF

1965, New York World's Fair, 50f green and violet, green frame printed on gum side with central vignette on the face, in addition trial printing of center in violet only, both in complete sheets of 20 (4x5), full OG, NH, VF

1965, New York World's Fair, 75f brown and violet, central vignette is inverted, central vignette is inverted and strongly misplaced and a common stamp, three complete sheets of 20 (4x5), full OG, NH, VF

1965, International Cooperation Year (ICY), View of New York, 25f-100f, complete set of four with omitted emblem in orange, in addition 100f in green (color of 25f stamp) with no orange, plus a common set of four, all are in sheets of 20 (4x5), full OG, NH, VF

1965, ICY, View of New York, 25f-100f, complete set of four with inverted emblem in orange (stamp of 100f in green instead of blue, error of color), in addition a common set, all are in sheets of 20 (4x5), full OG, NH, VF

1965, ICY, View of New York, 75f red brown and orange, brown frame printed on gum side with emblem printed on the face, plus stamp with omitted emblem and a common stamp, each one in sheet of 20 (4x5), full OG, NH, VF

1966, UNESCO Hydrological Decade, 5f-100f, two complete sets of three, one of which with red orange color omitted, in addition proof of 25f in green only instead of green and red orange, all are in sheets of 20 (5x4), full OG, NH, VF

1966, UNESCO Hydrological Decade, 5f-100f, two complete sets of three, one of which with red orange color inverted, both sets are in sheets of 20 (5x4), full OG, NH, VF

Air Post stamps. 1962, Conquest of Space, orange curved line overprint on 50f emerald, two sheets of 25 stamps from plates 1A and 1B with normal overprint, and three sheets from plate 1D with inverted, double and sideways overprint, the last one with insignificant perf separation at right, fresh, full OG, NH, VF

1980, Birds, 60f-100f, complete set of four, full OG, NH, VF and rare, this set was issued in very limited quantity, C.v. $1,200