1860, 1d blue, a fresh example with excellent margins all around showing small portion of adjoining stamp at left, cancelled by two pen crosses and used on 19 June 1860 entire letter from Zakynthos (Zante Island) to Kerkyra (Corfu Island), 'Nicolò S. Pasquale' correspondence; the cover was carried privately, without dispatch or arrival postmarks, though it still required the franking to be paid, an extraordinary usage on mail carried privately; at right below of the stamp there is a small trace of blue ink which is not contemporary to the usage of this cover and which does not appear in the Diena certificate; cert. Simmermacher (2022) and A. Diena (1963), signed Mezardi. (Image)