The Old Town with serial number 146184 is an 18 foot long, CS (common sense or middle) grade, Guide model with open spruce gunwales, ash decks, ash thwarts, ash seats, and a keel. It was built between July and October, 1946. The original exterior color was G. S. (guide's special) green. It shipped on November 6th, 1946 to Milwaukee, Wisc. The sail rig appears to have been added after it left the factory and the decks/ends may have been replaced/repaired previously.
The Old Town with serial number 123388 is a 16 foot long, CS grade, HW (heavy water) model with open spruce gunwales and a keel. It was built between October, 1937 and January, 1938. The original exterior color was dark green. It shipped on April 25th, 1938 to Havana, Illinois. The back side of the record shows that the paint had blistered by May 31st, 1938.
The Old Town with serial number 136260 is a 16 foot long, CS grade, HW model with open spruce gunwales, ash decks, ash thwarts, ash seats, a keel, and sponsons. It was built between October, 1942 and January, 1943. The original exterior color was dark green. It shipped on February 2nd, 1943 to Chicago, Illinois.
The Old Town with serial number 21230 is 16 feet long so my guess is that you have the one with number 21250. This is an 18 foot long, CS grade, Charles River model with red western cedar planking, open spruce gunwales, ash decks, ash thwarts, ash seats, and a keel. It was built in March, 1912. The original exterior color was gray. It shipped on April 18th, 1913 to Minneapolis, Minn.
The scans of these build records can be found by following the links at the attached thumbnail images below. These scans and several hundred thousand others 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/ot_records/ if you want more details. I hope that you will join or renew your membership to the WCHA so that services like this can continue. See
http://www.wcha.org/about-the-wcha/ to learn more about the WCHA and
http://store.wcha.org/WCHA-New-Membership.html to join.
It is also possible that you could have another number or manufacturer if these descriptions don't match your canoes. Feel free to reply here if you have any other questions. It looks like you will be busy this winter.
Benson