O boy - I love a mystery! Here's some more info:
Here's the best pic. I may see 14, then clearly see 336, perhaps followed by 67.
Here I see a 4 followed by 336 and maybe a 7
I see 143367:
As to the other features:
The center thwart is dead on 34.5" long, 36.6" to the outwales. It's 15' long.
The decks are tiny: 10.12" x 4.5"
The seats are pressed cane. The bolts are diamond head. The keel screws have built-in washers.
And here's a shot of the side construction.
And the stems are teeny - really thin. Only other canoe I've seen with stems like these was a Carleton. Could it be a Carleton? No carry thwarts though...
Thanks for your time Benson!