Have you tried winchester,s own web site first?if you had no luck,maybe numrich gun parts corp.may have one,or you might find one on E-bay.
Try the related link >>>> It doesn't explain HOW it works, but gives the steps to completely disassemble one.
Your winchester model 1897 pump shotgun was made early on in 1900.
Early in the year 1923.
Your Winchester model 20 shotgun was made early enough to have a date listed by serial number.After serial number 11253 Winchester lost the remaining records.Your Winchester model 20 was made in the year 1920.There were a total production of 23,616 shotguns of this model made.
Winchester Model 97 serial number 830987 was manufactured in early 1928. Bert H.
1898 An early one, only the second year of production.
Your Winchester model 1897 pump action shotgun which was made in the year 1911,will bring between 150-350 dollars.This is because your early 16 gauge was chambered in 2 9/16in shell length instead of the current 2 3/4in length.This change happened about 1927.The early length shells are no longer produced,which affects the value of your shotgun.
Well, what maker and model? Could be fairly collectable if it is an early Stevens or an old Winchester, but MOST .410 shotguns were not serialized until after 1968.
These early model 12 shotguns have been selling for between 375-500 dollars depending on the overall condition of the finish left on the wood and metal,and a good bore.
You have a very nice early model 1894 Winchester made in 1901.
You have a very early production Winchester model 70,that was produced in 1937.
Manufactured sometime in the early 1970s.