Lot 50525 – German States, Thurn and Taxis – 1858 1/3sgr, a marvelous

German States, Thurn and Taxis – 1858 1/3sgr, a marvelous and previously unknown engraved copper plate, unique; a copper plate being an exceptionally rare apparition in the Sperati archive, which proves that the master forger, besides his standard process of photolithography, also experimented with engraved copper plates to make the reproductions more convincing.