Thanks for the warm welcome!
The Norweigan Marine Mausers are quire rare, if I'm not mistaken. Nice find! Mine is the more common Army version (.30-06). I'm importing it from a Danish store, specializing in collectors firearms. Apparently they found a shipping company willing to do the customs declaration for me, which means the rifle can be shipped to my door. Very happy for that.
That warning is probably much needed! ;-)