Notes taken from George Madis, "The Winchester Book".
1866 production starts with SS# 12,476. #'s made that year, 2337. It is important to note that SS# from the Henry production overlap with the early 1866's.
35,656 1866's were produced in the year of 1871. This is the greatest # of '66's produced within a single year.
None were made in the years of 1895 & 1896. With only 3 arms being made in the years of 1892, '93, and '97.
In 1898, 1087 arms were made. The production officially ends in 1899.
Total produced is 170,100, with an additional 4,000 SS#'s being assigned to the repair department.
My best,
Blair