This is a folded letter dated May 6, 1875, sent from Brescia to Castiglione delle Stiviere, franked with a 20 centesimi stamp from the Kingdom of Italy. The stamp belongs to the Sardinian design issue featuring King Vittorio Emanuele II and is part of the typographic series printed by De La Rue & Co. in London. The blue shade is distinctly matte, and the stamp is perforated with a comb 14 gauge. It shows a boxed cancel and an additional datestamp partially overlapping the stamp. The letter is written on blue-lined paper with embossed stationery markings from a lawyer's office in Brescia, and bears full legible manuscript addressing and internal message. The back side of the letter confirms usage with full folding marks and complete circular datestamps. The item is catalogued as Sassone 25k, representing the third type horseshoe overprint series. The postal use illustrates the transitional period of the unified Italian postal system following the annexation of Lombardy and Venetia. Estimate "$100 – 140"