My knowledge of Sauer shotguns is pitifully poor. What book(s) would you suggest you acquire? I have been offered a gun that the seller refers to as a 60e. It is a boxlock with scalloped receiver and ejectors. He isn't asking much for it. I looked it over and asked him how he knew it was designated a 60e to which he replied that is the description given to him when he purchased it 20 years ago. Not much info to hang one's hat on. Then he told me it was slightly lower in quality than the Royal. Well all the Royals I have seen have lacked the scalloped back and were in my opinion lower in quality than the subject gun. Help appreciated. Thanks Slate