Help on mark on Italian sword ca. 1580

[Jens Nordlunde]

Thank you Giovani, this is most interesting. I too have a firangi blade with some of these stamps. The problem is, that the Indian smiths were very good at copying both blades and stamps.
Is there any indication of, how far down the blades there stamps would be - was there a standard measure from the hilt?
This could, maybe, help us to point out the copied blades/stamps.