Hello Pete, and welcome to WCHA.
137737 appears on an 18' Guide in GS (guide special - ie-no frills) trim. It had open spruce gunwales, ash seats, decks and thwarts and a keel. The original color was GS Green. It was shipped in October of 1943 to Rockford, IL. A copy of the 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.