The Old Town canoe with serial number 67680 is an 18 foot long, CS (common sense or middle) grade, HW (Heavy Water) model with red western cedar planking, open spruce gunwales, birch decks, birch thwarts, birch seats, a keel, outside stems, a floor rack, and sponsons. It was built between November, 1921 and January, 1922. The original exterior paint color was primrose yellow with a 5/8th inch light green stripe. It shipped on February 27th, 1922 to Kalamazoo, Michigan. A scan of this build record can be found by following the link at the attached thumbnail image below.
This scan and several hundred thousand more 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
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.