I just got this reply and thought I would add it.
pete
The WO probably bought the rifle in Germany. And that would be where they mounted the custom German style stock on it. German hunters prefer that type of comb on the stock. The German proof marks might add to the value for a collector; the stock certainly would also. Not to mention the Zeiss scope. It's definitely a custom rifle; probably worth at least $1,000 from what I've seen these European sporting rifles go for. The stock alone adds at least $300 in value, more if it's an exotic wood, more if the stock maker is well-known and signed his work (check under the buttplate). The scope is marked "West Germany" meaning it's pre-unification made. Adds a bit of value. Zeiss scopes retain their value very well and they're expensive to begin with. The German proof marks might actually be import marks if it's made by Remington for export. But in some cases, a German sporting rifle maker might import the parts and make the rifle there in which case it would be proof-fired in Germany and so marked with proofs. That would also explain the stock. Look all over the rifle and see what marks there are and post pics if you can.