The Old Town canoe with serial number 123493 is an 11 foot long CS grade 50 pounder model with a floor rack and a keel. The canoe was built between November 1937 and March 1938. The original exterior canvas covering was dark green with a white hair line stripe. The original ship date was March 21, 1938 to Long Island City, New York. A scan of this build record can be found by following the link behind the attached thumbnail image 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/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.