1867 (Sept 21): 5 c. blue-green, a horizontal strip of four used on 1867 cover to Livorno, cancelled by barred grid cancellations with 'Civitavecchia' cds alongside (Dec 17) in black. Framed 'PD' below and reverse with Livorno arrival cds (Dec 17). An extremely rare multiple on letter. Cert. Chiavarello (1997) Sassone = € 27'000. (Image 1) (Image 2) (Image 3) (Image)