Im looking for some help identifying my shotgun. It is marked JP Sauer and Son not Sohn and as I understand it, this gun was made for import to the US prewar. What I dont know is how to identify what model it is. I checked on the German sport guns site and got some great info regarding the proof marks but am wanting to know more about the model and or models that were marked with the English Spelling of sohn.

Thanks,
Dave