Geno:
I just scanned thru my notes and Sauer #186309 has a small crown on the left barrel flat and the word "Prussia" on the right flat. Sauer #197634 only has a large crown. And I think it was Sauer #146331 that had only a single large crown. Also Sauer DR #131857 has a small detailed crown on the lower right flat. From the examples I've seen, it appears that the both crowns are seen more on scatterguns and drillings that double rifles. And there may exist a double rifle, or single rifle, with both crowns which might point in a different direction. Double rifle drilling #174491 has a large crown on the flat of the scattergun tube.
The stamps of the series of multiple(sets of 2, 3 & 4) "caveman" with a "staff" denoted something?
Also I have in my notes that in 1875 Krupp applied for or acquired the "3 Ring" trademark. Anyone substaniate that?
Kind Regards,
Raimey
rse