"WONDERBOW" was a term applied to many models of Shakespeare bows.
Yours does not look like any Shakepeare that I have seen, but it looks like a '50's style bow so it could be an early Shakespeare.
I was probably refinished and the original names and stickers sanded off. Or, it could have been a homemade biw as was suggested above.
As Cody said, well worth $26.00