IF these guns listed were honoring the Lang & Hussey numbering system, this would be true:

1906 began with 13983
1907 with 14268
1908 with 14593

I think those dates would be pretty good rough estimates accounting for the fact guns could sit unfinished for some period of time.

I also think a date could be triangulated using Abercrombie and Fitch records since I've seen a lot of Husseys imported by then circa 1910 and they didnt have custom serial numbers.