The Disappearing Propeller Boat Company in Port Carling made three models of the dispro. This is a catalogue page from an advertising brochure that they published in about 1922 .

This is a water-ford  model in need of some work .It spent several years of it's life under the porch of a Muskoka hotel on it's side until recently .The picture on the right reveals quite a bit of twist in the hull .