The Old Town canoe with serial number 175259 is a 16 foot long Otca model with narrow two and 3/4 inch planking, mahogany decks, a keel, and the stern seat was moved two inches forward of the usual location. It was built between September and November, 1965. The original exterior paint color may have been pale blue but it was shipped with dark green on June 10th, 1966 to Chattanooga, Tenn. A scan of this build record can be found by following the link at the attached thumbnail image below.
This scan was 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 join 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.html to join.
The decal transitions were very gradual so it is not unusual to find newer canoes with older decals as they were using up the old stock.
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. Enjoy the rest of your restoration,
Benson