Updates to my earlier posting...
Thanks to Der Ami's response, I've learned that while JGA is in the Anschutz "family tree", JGA is not "THE Anschutz" company that we know of today. (Still, not a bad lineage though!)
Thanks to experts on the GGCA site, I now know...
* My rifle is not a "stalking rifle". Instead, it is known as a "Keilerbüchsen", or Running Boar Rifle. Those were specialized target rifles for competitions of the German Hunters Associations, where the rules did not allow full-blown Schuetzen rifles with peep sights, curved buttplates and exaggerated stocks. Hunting type scopes or open sights were allowed, but the overall weight was limited.
* This falling block action type was designed by Ludwig Catterfeldt, Mehlis, and protected by DRGM #127903 on 12/23/1899. Original rifles on these actions were signed "Luca Meiserschaftsbüchse DRGM" or Championship Rifle.
* The "Nimrod" action name which I edited into my first post is likely incorrect; reportedly, some authors have called an action type by the name first seen on such a rifle, whether that was the maker, retailer or middleman. Frank de Haas called the same action as mine either a "Kommer", "Kettner" or "Schmidt & Habermann" action in different pages of his book.
I think I'm now done researching this rifle -- and will instead focus on shooting and enjoying it!
Tight groups.
Old No7