Auction Series 257-264 in Zurich Day 4

Danube Steam Navigation Co 1867: 10 kr. deep green, Type I, Stone 2a, paper 0.07-.0.08 mm. thick, an unused block of fifty, being the right half of the sheet of 100 subjects, positions 6-10 / 96-100, thus showing all 10 Types identified by Hurt & Kelly and Ringström & Tester; the block with phenomenal depth of colour, some minor splitting otherwise fresh and very fine, unused without gum. A block of great importance and a rarity of the issue. Cert. Puschmann (1992) Mi = € 6'000+.rnProvenance: Collection Julius Steindler, RL, Basel, 14 March 1972, lot 258.
Catalogue 261: Stamp Issuing Steamship Companies