1919-20 Coat of Arms, complete set of ten different large die proofs in issued colors, each die sunk on full size card from the American Bank Note Company, fresh and v.f., rare (Cat No. 118-27P) (Image)

Est.$1,500

1935 Map of Bolivia, 12 different large die proofs in issued colors, also a master die in green, each die sunk on full size card from the American Bank Note Company, fresh and v.f., rare (Cat No. 219/32P) (Image)

Est.$1,500

1941-42 three covers to USA, each franked with a combination of diagonal bisects, with regular postage, some filing folds, otherwise fine-v.f. (Image)

Est.$250

1930 First Flight from La Paz to Germany, franked with six Zeppelin surcharges, also set of three "Z" overprints, all tied by 14 May 1930 pmks, with "Europa Pan-America Round Flight" and "Premier Correo Aereo Graf Zeppelin" cachets, v.f., with Friedrichshafen arrival pmk on back (Si.60D) (Image)

Est.$500