CJO:
Thanks for the effort and it looks to be a Masterwork/piece and has the D.R.G.M.(130243?) around the cocking indicators which would make it an earlier version. One thing that puzzles me(and yes there are many) is what separates a Model 18 from a Model 17. Yes I do realize the engraving, but the special order Model 18 scattergun had some sort of Sauer variant of chopper lump tubes with the lug/lumps and rib extension forged with the tubes. I haven't seen a patent or the process described.

The Caveman with a staff/Barbarian trademark was acquired in 1882.

Great find on the stamp Geno and you have an interesting summary with the 2 crowns together, separated, and one omitted with the first page.

Kind Regards,

Raimey
rse