I don't know if any other makes or models used the same rear top window frame.
There are at least three different Johnson logo window frames. I suspect they were due to tooling changes with the manufacturer. The dimension differences are all close. Radius of the corners changed as did the overall but only slightly. Also at least two different wooden inside frame constructions were used. One with mortice/tenon joints, the other finger joints. A reproduction without the Johnson logo is in the works. If someone has an engraving machine that can cut the logo on a curved surface a duplicate repop is possible.
