Howdy-- and thanks for waiting!
Old Town 161732 is a 15 foot CS grade fifty-pounder, built between February and June of 1954. It was painted dark green and sent to Camp Wenonah for Girls in Steep Falls, Maine on June 16, 1954. Were some of the pictures used on the cover of the later Old Town catalogs shot there-- it always seems like they're carrying a canoe up "a steep falls".
Old Town 183677 is an 18 foot guide model, built between August of 1969 and November of 1970... fitted with a keel and painted yellow, then shipped to Taylor's Marina in Raymond, Maine on August 3, 1971.
Your scans are attached below. Scans of approximately 210,000 records were created with substantial grants from the Wooden Canoe Heritage Association (WCHA) and others. Additional information about the project to preserve these records is available at
http://www.wcha.org/ot_records/ if you want more details.
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http://www.wcha.org/wcha/ to learn more about the WCHA,
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Kathy