Thanks everyone for your comments. The NID Super 10 described by Bill sounds like a duplicate of the one ordered by Capt Paul Curtis in about 1930. Curtis wrote that it came in at 8-1/4 pounds with 28" tubes. But Ithaca also sent a set of heavier 32" bbls gratis ... probably a statement by the factory folks. The gun weighed 9 pounds with the second set. For those interested, here's a link with more details on the hunt two weeks ago.
http://foxcollectors.com/My%20Forum/...hp?f=25&t=5129