Lot 97
1849, Ceres 20 c. black, horizontal block of 18 including a tête-bêche in the central position; fine fresh colour and large margins all around incl. ca. 10 mm sheet margin at left, unused without gum; an extremely fine and rare block; only few tête-bêche blocks of this stamp are recorded; signed Calves and Brun with certificates (1989 resp. 2010)
