The Old Town canoe with serial number 122543 is 17 feet long so my guess is that she has number 12543. This is a CS (common sense or middle) grade, Charles River model with red western cedar planking, closed spruce gunwales, spruce decks, spruce thwarts, spruce seats, spruce outside finish rails and a keel. It was built between October, 1909 and June, 1910. The original exterior paint color was N. H. (New Haven railroad) green. It was shipped on June 9th, 1919 to Toledo, Ohio along with 50 catalogs and a total of six spruce paddles that were five feet six inches long.
A scan of this build record can be found by following the link at the attached thumbnail images below. This scan and several hundred thousand more were created with substantial grants from the Wooden Canoe Heritage Association (WCHA) and others as you probably know well. A description of the project to preserve these records is available at
http://www.wcha.org/ot_records/ if you want more details. I hope that you will join or renew your membership to the WCHA so that services like this can continue. See
http://www.wcha.org/about-the-wcha/ to learn more about the WCHA and
http://store.wcha.org/WCHA-New-Membership.html to renew.
It is also possible that you could have another number or manufacturer if this description doesn't match your canoe. Feel free to reply here if you have any other questions. Hopefully this canoe can be saved,
Benson