Ot 28509 - 16?
Dennis,
This may bear re-investigating...#28509 is a 17' "Ideal" in AA grade with mahogany rails, seats, thwarts and decks. It also was built with half ribs, keel, outside stems and sponsons. It was shipped on 12/11/1913 to Maryland.
Thinking maybe the "1" is hiding, I come up with #128509 which is a 17' "HW" in CS (common sense) grade with spruce gunwales and birch seats, thwarts and decks. It was shipped on 8/6/1940 to Mass and was built with a keel and the original color was dark green.
See if either of these build records match with your canoe... and double check both stems, let us know and we will be glad to help further. Maybe also, pictures and measurements would help.
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Regards,
Ric Altfather