(now known as Boville Ernica)
Bauco was a 2nd class distribution post office, reporting to Frosinone. In 1871, Bauco had a population of 3,913.
Bauco, March 24, 1835 stampless cover to Vitorchiano (near Viterbo). Frosinone transit marking on front, rated 8 bajocchi.
Bauco, January 3, 1866, 2 bajocchi black on greenish white 1852, pays the reduced 2 bajocchi rate effective January 1, 1864. Frosinone January 5, 1866 transit marking on front. Roma, January 5, 1866 arrival marking on back.