Best thing to do is check out the German gun collectors site on the net. Doublegun BBS is also a great place to check on old guns.
The Ithaca brand shotgun was manufactured in New York. I don't know if this is the one you were looking for.
2011
This Shotgun was manufactured by the Mossberg Company.
Your Winchester shotgun was manufactured in 1914.
Unknown.
Unknown.
No
Manufactured by Davenport. sales@countrygunsmith.net
Parker Bros.
Dirks bentley
Your shotgun was manufactured in 1947.
The Ted Williams 200 shotgun was manufactured by Winchester and was the same gun as their Model 1200.