Looks like a Thompson Hiawatha, I live over in Brightwood, OR and have one of the Thompson forms on which these canoes were built, except mine is for the 18 foot Hiawatha, I'll include some images so you can compare canoes.
I've found that 50's era Thompsons had aluminum stembands, but have never seen one full length on the keel. It is also possible that it was added from a previous restoration.