That would be a mod Sudbury design. I made a half dozen of those 6 years ago. Edge grain Shag bark Hickory from Amish wagon wheel staves. 62 inches long at 45 to 50 lb pull at 25 inch draw, on a form ,and belly heat treated. 1 inch coming off the handle to 1 1/4 at mid limb to 3/8 at the tips. Slightly working handle at full draw. My bows ended up with 1 inch of set give, or take.I don't think my wood was dry enough to begin with, but with bone tip over lays, and a 10 strand FF string they are forgiving bows to shoot , and fast enough to dispatch a white tail.