293272
Try e-gunparts.com
You must provide a model number. 100-400 USD
With the serial number that you provided,your Winchester model 1897 pump action shotgun was made in the year 1912.
It's Ithaca, not ethaca. The serial number noted indicates it was made in 1947. Check out http://ithacagunrepair.com/page5/page23/ for a complete list of serial numbers by year.
If you are talking about a model 1890 slide action winchester, here is a site where you can enter the seriel number and it will tell you: http://armscollectors.com/sn/windates.htm
1927
Check the receiver, barrel
Check the barrel and receiver.
1979
Impossible to ID a weapon from just the serial number.
No published sn data
1925