Hello everyone! Needing some help with an old gun I just recently inherited. Marks on the barrel are 2 stamped flussstahl krupp essen on either side. They are in a circular stamp around something that looks like an x. Can't make out what those actually are. On the right barrel it's stamped Hubertus and on the left Suhl. Serial number for the gun is #56824. Proof marks stamped on the under side of barrels are as follows. Right barrel- crown with an S crown, with a W, crown with a U, crown with a JJ, 16/1, 16 in a circle, nitro stamped at the base near the bottom of the ejector. Left barrel- crown with a S, crown with a W, crown with a U, 16/1 16 in a circle, 8/25 and nitro stamped on the bottom. Any help would be greatly appreciated!