AH would make it a 1981 gun.
Beretta did make a Daly "Empire" model sxs. I think all of them I've seen have had a vent rib and extractors. Look to be the same gun as the Beretta GR series.
OU's . . . I'm not sure Beretta ever made any OU's under the Daly name. I had a Daly sxs from Italy that was NOT an Empire Grade, looked totally different. Also from the 80's, if I recall correctly. Don't know who was making their guns at that point. That would have been after Miroku stopped making both OU's and sxs under the Daly name in Japan.
