Damian,
I looked up that s/n and it seems to match your canoe. Kathy will have to post the build record when she gets home because I don't know how to do that. This information came from the disks compiled by Benson Gray and Dan Miller. Kathy will provide more information on that too.
Here is the info on S/n 53272 18: May( I think) 1919, AA Otca, 20" Mahogany decks, painted white, full bang plate, painter ring, 1 brass flag pole and socket,monogram to sketch on R & L bow (not shown), 1/2 ribs, keel, and outside stems. Shipped to E.L. & A.M. Bunn, Rockford IL.
Denis