Your curved spoke shave is really a leather-working tool. Snell and Atherton made tools for shoe making and leather working, and your curved spoke shave is really a heel shave for shaping the heels of shoes.
I used to have one. However, I never used it. I couldn't remove the blade to sharpen it. The two screws that hold it to the body were frozen in place, and the screw slots were messed up. So I never used it.
I hope that you can use yours. However, the mouth may be too wide to avoid tear-out, especially if you use it on curly maple. Sharpen it up and try it out, and let us know how it works!
Rick W