Stewart called this a "Banjorett" (and even wrote a schottische for it). They were also known as a "Giraffe Banjorette", etc. This seller thinks they have a gold mine and have had it for sale for at least a year. I emailed them about it when it was first listed, gave them a lot of information...which they chose not to use. Ah well!
They are pretty rare but not exactly something I want to spend $1000 on!