Ken:
I have thought about this dating problem for years. With no records available from Lindner's production, we are left to use the tools we have to come as close as we can. We are on the same page here.
If we assume that a gun was not given a serial number until it was finished and passed Lindner's inspection, it is easy to see that the action could have been built a little earlier than its number might indicate.
Using all the tools available, it seems to me that the gun was finished and shipped in 1891. But could very easily been built earlier. Say three or four years earlier.
Best,
John

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