Joe,
Brian has a good point, that extractor should have the full serial number or the last 3 stamped on the backside or on the guide pin. I would have to double check one to remember where they’re stamped.
Or maybe you have already thought to check this?

I did not notice any serial numbers on the extractor itself. The barrels, reviever, wood, forend iron, etc all have serial numbers, but did not see them on extractor. Not that I have looked real hard. I don't remember seeing them on any of my previous NID's.

NID Extractor
 

Joe,

I was incorrect on the extractor being numbered to the gun, the 2 NID’s that I checked are not numbered.
I checked an older Crass model and they were marked, but not with the serial, this was a part of a discussion here awhile back, what those #’s represent since they don’t match the guns serial number.
But back to the NID extractors, I’ve included a few pics of NID’s I checked and I believe they seem to fit somewhat tighter than the one you have. Don’t know for sure but it would seem a possibility that you may have a replacement extractor.

Stan

Ya, could be I guess, hoping that now that screw is tighter, and there is less play in it, they work fine....

A little update on my NID. After tightening up the set screw that holds the extractor in place, the gun worked flawlessly over the weekend on a quail hunt..... I guess it was just loose enough, that when one barrel was empty, it allowed too much play......

thanks all.

Let me sleep on that.... :D

BTW, this is the gun... Sort of fond of it. Brian Board restored the wood with Timberluxe, and Breck Gorman the barrels.

No longer 100% original, but I think she's 100% beautiful.... :D

Brian asked me to take these pics of it for his FB page after I got it back.