The Old Town canoe with serial number 151043 is a 15 foot long, CS grade, fifty pound model with Western red cedar planking, open spruce gunwales, and a keel. It was built between May and July, 1948. The original exterior paint color was dark green. It shipped on October 29th, 1948 to Hudson, Massachusetts. 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.
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.