I think we're in the same boat...clearly revenues, but too late to be in Forbin, I believe (i.e., I think they are post-1915). Therefore, difficult to assign a catalogue number to, and even harder to value...
There always seem to be many Italian revenue lots on
ebay, and this is the kind of thing that seems to populate them. That being said, without positive i.d., it always possible that one or another of them is gold. Unlikely, but possible.