1. 1850. 6 cuartos black (I-20). Subscription postmark "A", in Burgos blue. MAGNIFICENT AND EXTRAORDINARY RARE, UNIQUE IN BLUE COLOR ACCORDING TO THE OPINION OF GRAUS. Cert. GRAUS (pre-philatelic front is included for brand comparison).
Online Stamp Auction Spain and Colonies #113
Thursday, 7 March 2024 | 15:00
Lot 220
Starting price
800€