Looks like 132418 was assigned to a 18' Otca in AA grade with open mahogany rails, seats, thwarts and decks, and a keel. It was originally Dark Green and shipped to Clinton, Iowa in what looks like March of 1942. Build record is attached.
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It is also possible that you could have another number or manufacturer if this description doesn't match your canoe. Feel free to reply here if you have any other questions.