cover -- 1864 (22 Oct.) entire to Osieri bearing Italy 1863 De La Rue 5c. and 10c. (the former with one pulled perforation and imperforate at foot), tied by very fine "ESPORLATU" double-ring d.s. and with second strike adjacent. The only known impression of this datestamp on adhesives. Unique thus. Enzo Diena Certificate (1989). Photo