Below is a list of firearms produced by the Winchester Repeating Arms Company (later Winchester-Western Company and U.S. Repeating Arms Company), 1866–2006, by model:
In 1919 Winchester abandoned numbering models by the year of introduction and assigned two-digit numbers, sequential beginning with 51 for rifles. Older guns still in production had their model numbers truncated, e.g. the Model 1912 shotgun became the Model 12. There was one exception: the unconventional "Thumb Trigger" rifle, which was not previously numbered, was given the designation 99.[1]
Model 41 (1920) bolt-action single-shot .410-bore shotgun
Model 42 (1933) slide-action .410-bore shotgun (Model 12 variant)
Model 50 (1954) semi-automatic shotgun
Model 59 (1960) semi-automatic shotgun
Model 101 (1963) over/under shotgun
Model 22 (1975) sxs shotgun
Model 23 (1978) double-barrel shotgun
Model 37A (1973) single-shot shotgun (Model 37 variant)
Model 96 (1976) over/under shotgun
Model 370 (1972) single-shot shotgun (Model 37 variant)
Model 1200 (1964) slide-action shotgun (Model 12 replacement)
Model 5500 under-over shotgun (1987)
(Model 1200 variant)
Model 1400 (1964) semi-automatic shotgun
Model 1500 (1978) semi-automatic shotgun (Model 1400 variant)
The Winchester 1300 shotgun was first introduced in around 1981, when the US Repeating Arms Company (USRAC) took over production of the 'Winchester' brand guns from the Olin / Winchester corporation.
Model 9410 (2001) lever-action .410-bore shotgun (Model 94 variant)
First produced in 1904, this rifle was initially marketed simply as the "Thumb Trigger" until February 1919, when it was assigned the number 99 for the year the design was patented. Winchester simultaneously dropped the initial 2 digits from all year-numbered models for advertising reasons, so the preceding "18" was omitted from the outset. Model 99s were never actually marked as such; the designation was used only in sales literature. Houze, p. 77 & p. 94.
Winchester added the suffix "7" to the Model 67 and 69 when equipped with telescopic sights and no provisions for iron sights. These rifles, although seemingly out of numeric sequence, can be accurately described as variants rather than separate models.