1890, Santiago Derqui, four die proof sheetlets in irregular blocks of six of 2c in dark violet, lilac, indigo and black, printed on india paper, in addition card mounted proof in violet, all placed on two pages from a Collection, nice condition, VF
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400.00

1888-90, Great Personalities, essays of unissued denominations and designs on cards, San Martin 15c - 1 die and five of stamp size, Avellaneda 20c - 1 die, Lopez 24c - five of stamp size, Dorrego 30c - four of stamp size, Saavedra 90c - nine of stamp size, including horizontal pair, mounted on five pages from a Collection, generally fresh condition, VF and scarce assemblage
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2, 3, 4, 5

500.00

1890-92, Rivadavia 5c, four die proofs and 13 color trials, including block of eight, Sarsfield 1c, one die proof, most printed on cards (two on india paper) in various colors, mounted on two pages from a Collection, fresh condition overall, VF
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300.00

1891, Great Personalities, "peso" denominations, 16 die and plate proofs in various colors for issued 1p, 5p and 20p denomination, in addition 19 essays for unissued 2p, 10p and 50p, mounted on six pages from a Collection, a few items with minor toning, still VF and very rare
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2, 3, 4, 5, 6

1891, Admiral Guillermo Brown, large die proof of 20p in bluish green, printed on sunken die card with official oval seal at the bottom, mounted on page from a Collection, mostly VF and rare

250.00

1902, Puerto del Rosario, 58 imperforated trial color proofs on cards, a single, pairs, strips and blocks, in addition two die proofs, all are mounted on four pages from a Collection, minor flaws possible, mostly VF and rare assembly
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2, 3, 4

750.00

1910, Centenary of the Republic, imperforated plate proofs in black, engraved printing on glazed cards, complete set of 16, mounted on two pages from a Collection, fresh, VF
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250.00

1910, Centenary of the Republic, 1/2c-20p, 224 imperforated trial color proofs on glazed cards, including singles, pairs and several blocks of four, in addition die proof of 12c in blue on india paper, arranged on pages from a Collection and housed in blue album, mainly perfect quality, VF and beautiful assembly
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2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21