1957 International Geophysical Year, 15fr printer's inspection die proof in sepia, v.f., only 4-5 printed (Cat No. 10P) (Image)

Est.$150

1957 International Geophysical Year, 15fr red brown, magenta, black and blue, four different Artist Die Proofs, two signed, also stage die proof in black, design incomplete at bottom, v.f. (Cat No. 10P) (Image)

Est.$300

1957 International Geophysical Year, perforated and gummed sheetlet of three, n.h., v.f., scarce (Cat No. 8-10var) (Image)

Est.$500

1963 Seals, 8fr printer's inspection die proof in sepia, v.f., only 4-5 printed (Cat No. 22P) (Image)

Est.$150

1956 King Penguins and Map of Antarctica, 50fr hand-colored Signed Artist Die Proof, faint toned specks, still v.f. and beautiful piece, probably unique (Cat No. C1P) (Image)

Est.$150

1956 King Penguins and Map of Antarctica, 50fr blue (two), violet and black, five die proofs, two Artist Signed (Robert Cami), one unfinished stage proof (background omitted), mostly v.f. (Cat No. C1P) (Image)

Est.$300

1959 200fr Albatross, printer's inspection die proof in sepia, v.f., only 4-5 printed (Cat No. C3P) (Image)

Est.$150