I purchased an old rifle today. I have spent a couple of hours researching it with little success. I suspect there are Colt-loving members who also know this rifle. What I do know, on top of receiver is Walther logo with Waffenfabrik Walther Zella-Mehlis (Thur). This rifle is a single shot bolt action, probably from the 1920's. It is perhaps a pre-Sportsmodell V which was made in the 1930's I believe. The rear sight is fixed and as shown has a knob safety which turns red dot to fire and white for safe. Rifle has a heavy bull barrel. The right side of the barrel has a crown over B, crown over c, crown over u. Left side has crown beside N Nitro, serial number 14XXX which I believe is early. I believe it to be a civilian model. Condition is original as best I can tell. Bluing maybe 70%, bore nice, rifle fires, missing front sling swivel, lower buttstock repaired and cracks in the buttplate. Any thoughts regarding history and value would be appreciated. I am a member of several forums but this tends to be where I live. Thanks!