I've heard that a lot of times over the years, but never, in my entire life, have I ever seen a Beretta with a frame mounted safety. Then again, I've never seen a unicorn, either.
Beretta has made several models over the years, not just the older original model.
Here's my 92 Steel I (steel frame, vertec grip SAO trigger)
Also my Beretta 92 Combat combo (SAO trigger)