The Old Town canoe with serial number 165433 is 16 feet long, CS (common sense or standard) grade, a Guide model with thwarts in place of seats, and a keel. It was built in 1956, being finished on October 16, 1956. The original exterior paint color was Guide Special green. It was shipped on April 3, 1957 to Auburn, Maine. A scan of this build record can be found by following the link behind the thumbnail image attached below.
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/about-the-wcha/ to learn more about the WCHA and
http://store.wcha.org/WCHA-New-Membership.html to join.
It is also possible that you could have another number or manufacturer if this description doesn't match your canoe. If that is the case, photographs of the deck, side profile, seats, and other details would be helpful in identifying the canoe. Feel free to reply here if you have any other questions. Feel free to reply here if you have any other questions.
Greg