Old Town canoes didn't have letters in their serial numbers. My guess is that you may have the Old Town canoe with serial number 130356. This is a 16 foot long, AA (or top) grade, Yankee model with open mahogany gunwales, mahogany decks, mahogany thwarts, mahogany seats, half ribs, a keel, and outside stems. It was built between June, 1940 and April, 1941. The original exterior paint color was dark green. It shipped on July 12th, 1941 to Bolton Landing, New York. A scan of this build record can be found 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/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
https://www.woodencanoe.org/about to learn more about the WCHA and
https://www.woodencanoe.org/shop to donate or 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. Thanks,
Benson