Those Z-R side by sides from A&F used to be real sleepers on the used gun market. Not so much any more, especially the 28's. And some of the 20's are also very light. A&F started importing them after Francotte prices had taken a pretty steep jump and they were looking for a less expensive alternative "knockabout" gun to offer their customers. I recall reading that Guido Rizzini (now deceased) was the member of that family responsible for the project.
There was also a Zoli-Rizzini over and under. Not encountered as often as the side by sides.
