My guess is that you have the Kennebec with serial number 30341. This is an 15.5 foot, Joy Boy square end model with sponsons shown in the Kennebec records on pages 145 of volume three and pages 586 and 587 or volume five. It was planked by Roy on March 26th, 1927. The sponsons were attached by Lockard and then Roy canvased it on the same day. Grant applied the first filler coat on the same day. L. Thibodeau applied the second filler coat in October of 1927. It was trimmed with mahogany. F. Roy added the rails on December 21st, 1928. The "F 22" (Function number 22 or the keel?) was completed by L. Thib. on December 22nd, 1928. He completed the "F 24" (Function number 24 or the finish work) on December 24th, 1928, "F 25" (Function number 25) on December 26th, 1928, and "F 28" (Function number 28 or the painting) on December 27th, 1928. The original color was not recorded. I shipped to location "29-233" on April 10th, 1929. This location is probably an order number but we don't currently have enough information to identify it. The scans of these build records 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). A description of the project to preserve other records like these 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 renew.
More information about this and other Kennebec models can be found in the Kennebec catalogs contained on the Historic Wood Canoe and Boat Company Catalog Collection available from
http://www.wcha.org/store/historic-wood-canoe-and-boat-company-catalog-collection in the WCHA store.
It is also possible that you could have another number or manufacturer if this description doesn't match your canoe. See
https://www.wcha.org/forums/index.php?threads/9844/ and
https://www.wcha.org/forums/index.php?threads/13899/ for some pictures and information about a similar boat. Feel free to reply here if you have any other questions.
Benson