1854 - 3baj bistre orange upper sheet margin from "PONTECORVO", Papal States enclave Borbonico territory, to Roma, with oval postmark exceptionally used as only cancel on the stamps, and repeated at the back. Great rarity. Cert. E.Diena, Bottacchi and Mario Mentaschi postal report (Sassone 4+pt.R3 - € 52.500)
