This looks like a pretty typical pre 1892 Lindner made Diamond grade. The 35xx serial number points to a late first series serial number so production would be sometime in the last few years before 1892. Engraving style looks standard.....I was just looking at a similarly dated Diamond grade last month.
The guy writing the blurb doesn't know what he's talking about. The lack of proofs are because Prussia didn't have a proof house or require proof marks prior to 1892. And Daly didn't introduce a Regent Diamond model until nearly 20 years after this gun was produced.
Last edited by canvasback; 01/11/23 03:55 PM.