Interesting....so a conversion of a variant of a Cub.. as the original was a taildragger I guess it could be converted from any one of a number of machines. I guess its coincidental that it was first registered in 1951 which was the same year that the PA-22 series appeared.
As I cannot find it any references to Piper I'm assuming it does not bear the Piper name?
I do have something in the back of my mind....but I have a feeling that was a Tri-Pacer conversion (not the twin one).
As for "Moon River" I now have the song in my mind!
Time to sleep on it....perhaps Graeme or Bri will have the answer.