The Old Town with serial number 184600 is a 15 foot long Trapper model with a keel. It was built in between February, 1970 and June, 1971. The original fiberglass exterior was clear to show the natural wood. It shipped on June 9th, 1971 to Millerton, New York. 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 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/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 don't match the canoe. Feel free to reply here if you have any other questions.
Benson