Raimey, I'm not sure if it is German or Belgium. I believe it was listed as German.
They had the name listed as Erhardt Lauf, and I believe you are correct with Heinrich Ehrhardt. Lauf in German means many things and one is barrel.
Here is a picture showing the mark you stated and some of the gun, looks very well made.


I am trying to find out what part of the word means on the barrel, S(o-u)mmerda with the umlauts (dots) above the o or u.

Last edited by JDW; 02/08/10 10:25 AM.
David