Both the Pieper and Husqvarna made guns are a good value for the money. The gun at Simson was produced when Nicolas Pieper was running the company. My guess is some time after 1905 in the huge Pieper factory. It has all the typical Bayard markings, engraving, etc. It will have a greener cross bolt.
When you get it, take a look at the proof marks. If you have questions, you can post them here along with pictures of the proof marks, which will help to pin down the production date.
The issue is more than the chambers or damascus. Pieper did change their steel to conform with the increasing service pressures over time. These shotguns where produced over a very long time. I have a 28ga version made in the late 1940's that I use for hunting. Took some grouse and rabbit with it a few weeks ago in Wisconsin.
Pete
