The Old Town canoe with serial number 151066 is a 17 foot long, AA (or top) grade, HW (heavy water) model with red Western cedar planking, open mahogany gunwales, a keel, and a floor rack. It was built between July and October, 1948. The original exterior paint color was dark green. It shipped on June 19th, 1950 to Lewes, Delaware.
The Old Town canoe with serial number 117406 is a 16 foot long, CS (common sense or middle) grade, Yankee model with open spruce gunwales, ash decks, ash thwarts, ash seats, and a keel. It was built between March and May, 1936. The original exterior paint color was Prin. (Princeton) Orange. It was shipped on June 8th, 1936 to Danbury, Connecticut. The back side indicates that there was a prior request for a copy of this information on May, 1981 from Port Jefferson Station, New York.
The Old Town canoe with serial number 28806 is a 17 foot long, CS (Common Sense or middle) grade, Otca model with red Western cedar planking, open spruce gunwales, maple decks, maple thwarts, maple seats, a keel, and a floor rack. It was built between October, 1913 and February, 1914. The original exterior paint color was bright red. It shipped on February 25th, 1914 to Dayton, Ohio.
Scans of these build records can be found below. These scans and several hundred thousand others 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/ot_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 these descriptions don't match the canoes. Please attach some pictures of the serial numbers from each end of number 151066 if it is really a 16 foot long canoe. See
https://www.wcha.org/forums/index.php?threads/10494/#post-54642 for a longer explanation of the issues related to having a self-service serial number lookup. Feel free to reply here if you have any other questions. Thanks,
Benson