Not sure but I have #9972
No known sn data published.
Check the barrel and receiver
Try the receiver, barrel, forend
Check the receiver and barrel
look on the breach, barrel.
Please include the model number of your Winchester shotgun to get a correct answer to your question along with the serial number.
With the serial number that you provided,your Ithaca double barrel shotgun with the damascus barrels was produced in the year 1900.
You may have to break the shotgun down in to the barrel section and the receiver section first.Look under the barrel section on the flat just ahead of the lug for the serial number.
when did spring make 12g single barrel shotgun serial number 30368
next to the barrel
Check the frame and barrel
Look on the receiver and barrel.