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From searching I understand it was made by Winchester for Sears. If you would like to obtain factory research on your Winchester, we urge you to join WACA and the Cody Firearms Museum. Mauser Rifle Serial Number Lookup - coolcfile. Those dates coincide with the Madis dates and can be viewed on Winchester’s site at:

Our sources disagree a bit, but this seems to be the best set of. Please be aware, only serial number ranges with an approximate year are provided blow. For purposes of determining if your gun is legally considered an “antique” (pre-1899 DOM), the BATF has told us they use the DOM dates published by the manufacture (Winchester). Our database contains values of serial numbers through 159337 which ended the year 1922. Please enter a serial number and click the submit button. This information is no substitute for obtaining a Winchester Factory Letter from the 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. WINCHESTER DATES OF MANUFACTURE Winchester Model 1894 (Mod 94): Covering numbers: 1 - 5103249. George Madis, Ned Schwing, etc.), in which case the data was extrapolated to the best of our ability. In November of 1968, the Gun Control Act (GCA) of 1968 was enacted into law, and as a result of that law, Winchester added the L prefix to the Model 1200 serial numbers. To the maximum extent possible, the dates of manufacture shown were obtained from the original Winchester Factory Polishing Room serialization records otherwise estimates were made using multiple sources of information (e.g. If we assume a relatively linear production rate, that would indicate that your gun with serial number 398083 was manufactured early in the year 1968.

Winchester serial number lookup