Welcome, the Old Town canoe with serial number 213678 and hull identification number XTC13678M76K is a 17 foot long Chipewyan Tripper model with aluminum inserts in the rails that weighed 77 pounds. It was built in May, 1976. The original exterior color was avocado. It shipped on June 21st, 1976 to Beaverton, Oregon. The back side of the card shows that there were some scuffs on the outside near the bottom of the hull. A scan showing this build record can be found below.
This scan and several hundred thousand more were 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 donate, join, or renew your membership to the WCHA so that services like this can continue. See https://www.woodencanoe.org/about to learn more about the WCHA and https://www.woodencanoe.org/shop to donate or join.
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.