TWO SICILIES, NEAPOLITAN PROVINCE, 1861, 20g YELLOW USED, #26. full margins, Napoli al Porto d.s., tiny thin spot in left margin, fine-very fine, signed Enzo Diena, also by Dr. Helmuth Avi and with his 2019 cert., cat. $3,350.00, Sassone #23 @ €7,000.00 (Image)