I'm sorry to have taken so long to respond. The Kennebec canoe with serial number 10512 is an 18 foot long Guide's model as shown on pages 452 and 453 of volume two in the Kennebec ledgers. It was planked by Murray on January 15th, 1916. The canvas covering was put on by Roy on February 15th, 1916. Hanson applied the first filler coat on February 15th, 1916 and the second coat on April 22nd, 1916. The rails were applied by Cary on April 24th, 1916. Mansell painted it M. (medium) green on April 25th, 1916. The shipping destination and date appear to be blank.
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) as you probably know well. 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 and I will try to respond more quickly.
Thanks for your reply. This description matches that of my Dad's canoe. It was given to him as a gift when he was a child. My father grew up and still lives in the Syracuse NY area. He'll be thrilled to learn more about his canoe's history.