Franco Bollo Postale. These stamps were from independent Italian states before the unification of Italy through the 1860s and 70s (Italy actually fought three wars of independence). These are specifically fro m Roman States, which started issuing their own stamps in 1852, and discontinued in 1870, when they joined the unified Italy and started using Italian stamps. The problem? There are A LOT of forgeries of Roman States stamps out there. I bet these are forgeries but we'll see. Italian Stamps, Fought Three, Italian States, Postal History, Independence Italian, Franco Bollo, Bollo Postal, Romans States, 70S Italy
Also on these boards
A museum in Civitella del Tronto, Italy details Italian participation with the Confederacy in the American Civil War. Following the Italian Wars of Unification, where the independent southern Italian states were conquered, thousands of Italians fled to the American South. Entire regiments were made up of these Italian immigrants/refugees and many were veterans of the wars that saw their previous homelands conquered, only for the same thing to happen to them on another continent.
Gotta figure out how to get some of these while they're still in circulation... but I'm not likely to get to the UK anytime soon... :-(