Old Town 176276 is a 17 foot Molitor model canoe finished May-July of 1966. It has a keel, outside stems, a mast seat and step and a rudder and was originally painted design #46. It was shipped to Buffalo, NY, on July 28, 1966.
A copy of the build record is attached below, click on it for a larger image. This scan 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 will join or renew your membership to 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 to join.
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.