Your rifle appears to me to be in completely original condition and to have had little use. The partial stamp on the water table is just poorly struck. From the appearance of the breech face, I'd say it's been shot very little. Any imperfection in the bores is likely the result of poor cleaning. Enjoy.
How wonderful Bill.
What makes me think it received little use, other than the breech face, is the horn butt plate. Too bad the worms got to it, as its checkering (flat diamonds) is crisp, and the engraving on two retaining screws is undamaged.
I also had a chance to weigh the rifle...9 lbs even on the digital bathroom scale.