Old Town 131870 is a 15 foot CS (common sense or middle) grade Ojibway model canoe-- this is an uncommon model not offered in Old Town catalogs, but I have seen it before, being sent to boy scout camps and such-- in this case it was a Red Cross canoe, so my guess is that it may be similar to the fifty pounder-- perhaps someone will chime in on that. This canoe was completed March to May of 1941, with open spruce gunwales, mahogany decks and ash thwarts. It was ordered without seats. It has a keel and the original color was aluminum. It was shipped to the American Red Cross in Taft, California, on May 24, 1941. Image of the scan of this record is attached below-- click on it to get a larger image.
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 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 to 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.