Did a bit of searching because I'm too curious to wait - two photos of a model is all I've found so far. Having the right name helps a little
As I'm a lurker hopefully someone can parse the links to make it easier for others
Matt Van Leeuwen "Sylph"
flickr.com/photos/39375104@N08/6941277240/
From page 6
calteches.library.caltech.edu/528/2/Bettes.pdf [1982]