What is the proof date? 100 years old would mean a nitro proof and 65mm chambers. Is it tight? Is it worn and on the flats? Is the stock cracked at the cheeks or tang? You use the term Erhardt Lauf as the maker. Erhardt was simply the barrel maker, not the gunmaker. Heinrich Erhardt was a barrel maker in Dusseldorf. He made a lot of barrels for Meffert. Is this a Meffert gun? Does it say Hubertus on it?
Depending on maker, model, and condition it's wroth between $50.00 and ????? on up.
