Winchester has a website that lists most of the models all you have to do is put in the serial number and it will show you the date of manufacturer.
By the serial number.
Your Winchester model 42 was made by Winchester in 1934.
Your Winchester,s shotgun can be aged by the serial number on it.You may post the number on this sight and I can determine what year it was made,or post it to me and I will get right back with you on what year your Model 12 was manufactured.
Your serial number indicates that your Winchester model 61 rifle was made in the year 1938.that year Winchester made 5,991 model 61 Winchester,s.
Your Winchester model 12 was made in the year 1923.
Your Winchester model 9422m was made by Winchester in 1973.
your winchester model 1894 was made by winchester in 1967.
Your winchester model 1894 was made by winchester in 1977.
Winchester kept records of the production of the model 1894 rifle.These records showed how many were made each year of production,and the starting and ending serial numbers of each year of production.
Your winchester model 1907SL was made by winchester in the second year of its production which was 1908.
Your Winchester model 70 rifle was made in the year 1965.
Your winchester model 70 was made by winchester in 1965.