Also note
That in the olden days, serial numbers were assigned almost randomly, and sometimes re-used.
Case in point: a good friend recently inherited an L.C. Smith shotgun (A-1 grade) w/ serial # 787---even though only 739 were ever made. Furthermore, this one was made during the LAST year of production, but guns from prior years have HIGHER serial numbers. This because L.C. Smith used 4 and 5 digit numbers prior to 1898 (when this gun was made) but then "started over", for some models in 1898....And for some arcane reason, they started over with #560!