I know, the factory wasn't in it to be consistent. I gave you what I thought were safe numbers. 32 New Departures from #s 15475 to 25405 were all shipped in 1890. Then clear up at 26000 in my data base # 26314 was shipped in April of 1889. The factory set aside some guns for reasons we can't explain and shipped them at a later date. One theory is that they would make up a bunch of frames and throw them in a big bin. Then before they were all finished they would make another batch and put them on top. I also think it is possible that the hand written records were often in poor shape and hard to read a hundred or more years later and some were transcribed out of order.
Best I can do for you though.

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Mark Connot