The Old Town with serial number 182426 is a 15 foot long light weight model with a keel. It was built between January and February, 1969. The original exterior paint color was red. It shipped on March 24th, 1969 to Wilmington, Delaware. A scan of this build record is attached below.
This scan and several hundred thousand more were created with substantial grants from the Wooden Canoe Heritage Association (WCHA) and others as you probably know well. 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. Your lifetime membership is much appreciated.
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.