Lot 40268 – 1877, 260r dark brown, block of four, used

1877, 260r dark brown, block of four, neat impression and infrequently strong colour, cleanly and harmoniously showing two strikes of a segmented cork postmark in violet-black which were aesthetically-fine struck; the rarest and most valuable used block of four of any “Dom Pedro” stamp in the three issues, one of three recorded and this example being the finest; ex Dr. de Amaral Machado.