1915 DWM what do I have here?

[Clarkaim]

All the numbers end in 26, but the sideplate and takedown are marked different than my shooter grade. is that normal or was it forced matched maybe? Not real knowledgeable about lots of this stuff. I got it off a guy at a gunshow who wanted to sell it cheap to buy something else, paid shooter price for it. Blueing is definetly rust blue and I think is original, not a reblue. it has one issue tho.

unless you cycle it firmly, it will sometime not catch the striker on the sear. This is remedied by popping into battery rather than gently closing it. Dry fires fine, haven't taken out to shoot yet. Bore is good, some crud in it ( no time to clean due to workschedule. What have I got?