1860 - 1/2 t deep blue 'Crocetta' with complete gr
1860
1860 - 1/2 t deep blue 'Crocetta' with complete group margin at left (pos. 61 of the Em. Diena study and pos. 41 of the De Angelis Pecchi study). Exceptional, great rarity: only 3 or 4 copies recorded, listed in Sassone p.187. Certs. Manzoni and Diena (Sassone 16b - Euro - )
