The Old Town Canoe serial number 15705 belonged to a 17-foot AA (or top grade) HW model canoe built in 1911 and shipped to Ontario. It had spruce gunwales and finish rails, with mahogany seats, thwarts, and decks. It also came equipped with a floor rack, a middle thwart, a cane seat, and two maple paddles. The original color was dark green.
Serial number 172651 belonged to an 18-foot square-end canoe built in 1962 and shipped to Norton, Vermont. It had half ribs, outside stems, a rowing seat, and sponsons. The original color was also dark green.
The scans of these records are attached below-- click on them to get a larger image. These scans and several hundred thousand others were created with substantial grants from the Wooden Canoe Heritage Association (WCHA) and others. 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 and anyone else reading this will join or renew membership in the WCHA so that services like this can continue. See http://www.wcha.org/wcha/
to learn more about the WCHA and http://www.wcha.org/join.php
If you are selling your canoes and plan to use these build records as part of an ad, please consider giving the WCHA credit for this information on eBay or craigslist or wherever your canoes are listed.
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.