Finally I found it!
Marto marked M9 with green scabbard and fittings.
Now some nice comparison shots between an M9A1 and an M9, both Marto marked.
These two models were the only one with the "MARTO" markings one the blade.
P.S. Gentlemen, keep an eye opened on the forum classified section, as I have a Marto M9A1 duplicate (scarce!!!!) and a tan M9A1 that I want to trade (but not sell, at the moment)