What year was my Winchester manufactured Serial Number Reference Winchester, firearms Manufacturing, dates by Serial Number and Year. 1866 through the early 1990s. Below is the download link for a special resource for. Winchester dates, oF manufacture. Henry Rifles Model 1866 Model 1873 Model 1876. Winchester Dates of Manufacture Model 1894 (Mod 94) - Winchester Dates of Manufacture Model 1894 (Mod 94 ) Model 1895. Winchester Model 1894 (Mod 94 Covering numbers. Please enter a serial number and click the submit button. Below is the download link for a special resource for dating Winchester firearms. Cody Firearms Museum (available for certain models and serial ranges) which in addition to the Serial Number Application Date, normally provide the original Received In Warehouse Date and Date Shipped from Winchester factory. Please keep the following points in mind as you explore these pages: Many of the Winchester brand firearms produced over the years are included, but not all. For Parts and Service call: 800.322.4626. This information is no substitute for obtaining a Winchester Factory Letter from the.