The Old Town canoe with serial number 42886 is a 17 foot long, AA (or top) grade, Otca model with red western cedar planking, open mahogany gunwales, 20 inch mahogany decks, mahogany thwarts, mahogany seats, a keel, outside stems, a floor rack, and sponsons. It was built between April and June, 1916. The original exterior paint color was dark red. It shipped on July 21st, 1916 to Big Bay, Michigan. A scan of this build record can be found below.
This scan 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/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 renew.
It is also possible that you could have another number or manufacturer if this description doesn't match your canoe. The diamond headed bolts didn't appear until around 1922 as Gil mentioned. Feel free to reply here if you have any other questions.
Benson