Pic from a friend.

Kingdom of Italy / Regno d'Italia 1926 (I think, correction welcome of course)
Searching on
ebay to find something similar, as I do not have an Italian catalogue, I found that using the Italian words 'varieta floreale' (floral variety) returned some similar examples to this.

The floral ornamentation is missing or failing (Italian ornato mancan).

The examples on
ebay I have seen so far have an overall failure of the ornamentation. But this stamp, as seen ,is half off, half on.
Questions: what caused this? under-inking of some sort? Is this type of variety valued somewhere online? What is this stamp series called (who is the guy on the stamp)?
. . . and please excuse my Italian.