Oh yes-- I remember looking at your pictures, Dave, and not having anything to contribute. It's an interesting canoe. Unusual seat. Doesn't seem to have jogged anyone's memory though.
I know what you want to learn is the name of the builder, and so-far that's a mystery. Looking at the serial number, I would guess the canoe is 16 feet and was built in 1945... but this is only a guess. In 1945, it's unlikely cane would have been available because of the war. The seats, however, could have been replaced. With a serial number that high, you'd think there'd be a lot of canoes by this builder "out there", and that it would be recognized... but it's paddling-season and maybe when the weather gets chilly, more folks will be reading the forums and someone will recognize this canoe.