These electronic archives are quite large and disorganized so you have to wait for a volunteer to research the record for you.
The Kennebec canoe with serial number 13770 is shown on page 229 of volume two in the Kennebec ledgers. This was assigned to 17 foot long Torpedo model. The type or grade column is blank so I assume that it probably is a type A which is similar to Old Town's CS grade. It was planked by Mansell on January 31st, 1920. C. P. Roy canvased it and applied the first filler coat on the the same day. DeRado(?) added the rails on May 8th, 1920. The original color was green. It shipped to Frances Murphy on May 7th, 1920. These last two dates appear to be out of sequence but that is what the record indicates.
The scans of this build record can be found by following the links at the attached thumbnail images below. These original Kennebec records are reproduced through the courtesy of the Maine State Museum.
The microfilms and scans of these records were created with substantial grants from the Wooden Canoe Heritage Association (WCHA). I hope that you will renew your membership or contribute 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 renew.
It is also possible that you could have another number or manufacturer if this description doesn't match the canoe. Feel free to reply here if you have any other questions.