Quoted:
Some of my ideas: (looking more for a Gentleman's knife then anything that looks intimidating or tacticool)
I wouldn't advise that sort of knife in much of Europe, particularly given several are spring-assisted. Much beyond a SAK or multi-tool
may be interpreted as offensive by an individual LEO, which is all that may need to happen for it to become a difficult situation; to give an example, in the U.K, I believe they can deem anything within reason as an offensive weapon.
A Kershaw copy was used in quite a high profile stabbing a few years ago here, with the media picking it up as an automatic knife. I doubt most LEO would know the difference or accept it outside court.
I don't know much about Italy's laws. You should probably try asking over at Talkblade.info or Bladeforum; TB specialised in Italian knives, I think.
A small SAK should be safe enough in most places; claim you required a bottle-opener and/or corkscrew.