It is an ancient traditional Italian knife with cartridge extractors for shotguns, more precisely a “Mugellano”.
It is typical of an area of Tuscany called "Mugello" from which the knife also takes its name.
It was produced in the city of Scarperia, the historic homeland (along with Maniago) of the Italian cutlery tradition
Unfortunately I no longer see it for sale on the international site or even on the European one.
The “Aged Steel” version was, however, a quick meteor among the Phoibos production
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