Wow that is sweet !!
I have seen two other O Geygers,both shotguns and both very well made,like yours !
I talked with one dealer who had one of them and said that Geyger was a retailer in Berlin,he also mentioned that there where rumors of Goring having a interest in the firm.I like the term buy the gun not the story but it may be true.

Where did you find that fine rifle? The checkering on the grip, the barrel work,the engraving,the condition,the case color, and the wood all top shelf.Damn thats one nice piece wish I found it !