Welcome, the Old Town with serial number 189130 is a 15 foot long Trapper model with a keel. It was built between April and August, 1972. The original fiberglass exterior was clear to show the natural wood. It shipped on August 15th, 1972 to Bangor, Maine. A scan showing this build record can be found by following the link at 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/catalogs/old-town/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 to join.
It is 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. Happy paddling,
Benson