Humbert I
Humbert succeeded his father in 1878, which necessitated a new issue of stamps. First appearing on 15 August 1879, they were the first stamps of the kingdom to be entirely designed, engraved, and printed by Italians. Since considerable stocks of Victor Emmanuel stamps were left over and finances were poor, the old stamps continued in use for some years, and some values of Humbert's stamps were little-used during his reign.
The new series incorporated rates and colors mandated by the Universal Postal Union.
Read more about this topic: Postage Stamps And Postal History Of Italy