Welcome, the Old Town canoe with serial number 200648 is a 17 foot long Otca model. It was built between April and August, 1974. The original exterior paint color was yellow and it shipped on September 30th, 1976 to Fairbanks, Alaska. 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 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 donate, join or renew your membership to the WCHA so that services like this can continue. See http://www.wcha.org/about-wcha
to learn more about the WCHA and http://www.wcha.org/store/membership
It is also possible that you could have another number or manufacturer if this description doesn't match the canoe. See https://www.wcha.org/forums/index.php?threads/11964/
for a similar canoe that shipped in the same order. Feel free to reply here if you have any other questions.