Mystery Solved!
Roger, et al. -
Looks as if the canoe is definitely 110498, now that I've been able to examine it carefully. That would make it the 1932 Yankee 16' model. The first "digit" is clearly a "1", not just an extra scratch. And to seal the deal, I found traces of Deep Orange paint on the gunwales. That would also indicate that the second build record for 110498 was misnumbered, and should be 110499.
I ordered Dan Miller's Old Town Catalogs CD to help me make sense of differences between OT's various models, now and in the future. And I'm going to try to figure out a little more about the history of this particular canoe, if I can track down the right people. Looks as if the boat isn't in bad shape for being 77 years old, and new decks, gunwales, keel, canvas and finish will make it good as new.
One other question: Does WCHA, or Old Town, or anybody, keep a serial number database of the owners of canoes that have been restored or that are still in good shape? I suppose you can register any Old Town canoe S/N with Old Town, but it seems as if it might be a good idea to have a WCHA database of who owns what.
Thanks again for your help!