I bought an old trailer and assumed it was homemade. It has some unique features that lead me to think there might be more to it. The seller said it had a 1954 Dunphy on it. There is an adjustable cradle to support the back of the boat, and a series of keel rollers with grease fittings on each. The winch is mounted under the frame with a pulley located above to pull the boat on the trailer. Perhaps it was custom built for the Dunphy boat. I have included some pictures. Any feedback would be appreciated.