Steel or brass frame?
If you don't find A.S.M. or Armi San Marco on the barrel under the loading lever, (and you probably won't), then look for DGG in a triangular arrangement under the grips on the grip frame. You have to take it apart to find it.
DGG is Armi San Paolo. I Think slightly better manufacturer than their competition.
My reading of history convinces me that most bad government results from too much government. Thomas Jefferson