Welcome and congratulations, the Old Town with serial number 70128 is an 18 foot long, CS (Common Sense or middle) grade, HW (heavy water) model with red Western cedar planking, open spruce gunwales, ash decks, ash thwarts, ash seats, a keel, and sponsons. It was built between March and April, 1922. The original exterior paint color was dark green. It shipped on April, 21st, 1922 to Milwaukee, Wisconsin. 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 your canoe. This model listed for $82 in the 1922 catalog. Feel free to reply here if you have any other questions.
Benson