40X,
Based on your description( photos would be better), you have a Simson- Jaeger. Franz Jaeger, the grandfather of the German Gun Collectors Assn. founder, was the designer. The double lugs makes it more stabile (side to side). Also I think you will find it doesn't have a hinge pin, rather it has a solid round lug milled into each side, these being larger than a typical hinge pin. The locking lugs are likely covered by plates, rather than being let into the action. Drillings made on this action were not as thick as common drillings, because the locking lugs would be next to the rifle barrel, instead of under it. This action was available in hammer and hammerless form. Does it have both British and German proofs ? If it was a war trophy, it would carry both. If it was made for export to England it wouldn't have to have German proofs. It is a good find.
Mike

Last edited by Der Ami; 04/24/21 01:52 PM.