D35 Model

I am now the owner of a model of the Dickerson 35 ketch.  The model is four and one-half feet long and was built using essentially the same construction as the real boats; frames, planking, etc. The cabin top is removable and the interior is fully built out as well.  I am trying to find out who built it with no luck.  It looks like it was made in the 1960s.  Rumor is that four of them were made.  Any help will be appreciated.  Thanks, John.