Raimey I think we'll go with Mr. Leck for now. The action, engraving, trigger guard, rib style is identical to your last pic.
Some things different are the damascus type, horn encased under-lever and pistol grip at lest I can't make them out.

I can't see any umlauts in my pic. but will give the gun a more thorough look. Your input has been / will be very enlightening so thank you. I will arrange to get more pics. in the future.

--- John