STOCKHOLMIA 2019 & ERIVAN Worldwide Rarities

1861 (April 10), Woodblock 1 d. brick-red, a fine used example with ample to large margins all round, showing the major Plate Flaw with part corner ornament missing from design at lower right, lightly cancelled by CGH triangular obliterator in black leaving the variety clear. A scarce and most unusual stamp, especially in this shade. Cert. RPSL (2019) SG 13b = £ 5'000+.