Struck On A Planchet Partially Cut?

Ciao, what do you think about this Tallero of Eritrea, struck in Rome in 1918?
It shows on both sides (much more on the obverse) the traces of a circular cut.
Of course for this type is out of question the damage made by counting machines.
I don't think this is a damage occurred after the coinage, but before.
I was thinking about a planchet that was first partially cut off center and after cut properly and coined as usual. Before of all because the circular line is visible in both sides and it is exactly coincident.
I know tha the planchets of this type of Tallero where first cut and the edge was impressed with the writing FERT FERT FERT and with the drawings and stars in relief and that only after this it was put in the machine to be coined. The planchet was 37 mm and being free on borders, without a collar to contain it, it could expand during the coinage until the regular size of 40 mm.
The circular sign is quite deep on the obverse, almost 1 mm (visible on the edge) but it is not a large line: the two sides of the cut are in contact because, I think, during the process of coining the expansion of the metal made the groove flaps closing.
A last evidence for this idea is that the diameter of this circle is a little smaller of the coin diameter, exactly the size of a planchet going to be cut.


By the way, other ideas are welcome! Thanks!
Roberto