Blue Book of Gun Values, proofhouse.com
Click the link.
Any auto parts store.
It's just a chart that you will find at most parts stores, that shows you a cross reference, of different brand name filters for that specific car
Here is one onlinehttp://www.wixfilters.com/filterlookup/index.asp
Go to Baldwin filters and enter data requested
My cross reference list indicates that this is a Savage 59. If your local gunsmith can't find the parts, you can check with www.e-gunparts.com
Try e-gunparts.com for parts and Proofhouse.com has a cross reference chart that may help.
I can't find a cross-reference for that number, but Eastern Arms was a trade name used by Sears Roebuck. Most of the shotguns were made by Stevens/Savage.
cross by HF6351 FLEETGARD FILTER
You can find a cross reference to this number at Fluitek in the related link.
Spreadersettings.netau.net
Yes, you can find a Fram site on the 'net with a cross-reference feature.