I don’t know the knife laws in Italy, especially not for the specific part of Italy this occurred in

But often laws about switchblades and such have to do with carrying them, or occasionally selling them, but often just owning a switchblade and keeping it at home isn’t really an issue

As far as manufacturing, I again don’t know about the specific regulations, if there’s maybe any kind of licensing or something needed, but I know for a fact that it is either not totally illegal to manufacture a switchblade in Italy, or they are *very * selectively enforcing those laws because there are some very well-known manufacturers of them based there (if I had more disposable income I’ve had my eye on a Frank Beltrame stiletto for a while)