The following does not apply to Fabbri but might interest you. Some time ago I saw a high end named gun offered for sale at much less than current prices. I sent the maker the SN asking for informations about the gun. Here is the reply with some deletions:

"The gun...is one of the first we made. At that time we bought parts from an Italian supplier and assembled them....I couldn't find any news about that gun....It was built years ago...."

You might want to contact the maker for information about the gun in question.