The 1940s must have been a golden age for wheel production. Here's another one. It's the Wheel of Musical Knowledge, by someone with the rather grand name of Royal C. Mathewson. It's 9 x 10 inches and in good shape. In real life, the color is a bit bluer than the photographs are. We actually have two of these and, remarkably, each came with its original envelope. In real life, the envelope is not as blue as the photo shows. Go figure. If there were ever instructions on how to use this thing, we don't have them.
I like this this wheel for its elegant and simple design. If someone were to design this today, it would be a garish plastic thing covered in pictures of pop stars. And it would have advertising on it.
Speaking of original envelopes, you may recall the star finder from July 16th. I found the original envelope for that one today, so I've pasted it below.