I can't identify who made the bow, but I have it's twin. The backing on yours appears to be rawhide, not fortisan. Mine is backed with very thin rawhide or that heavy paper(?)that some bowyers used back then. The hinge is by Zwickey(unmarked but confirmed to me verbally by several sources.) My grip is nicely made with brown leather.
It's a rare bird, that's for sure. In 30 years of collecting, I've only heard of maybe two others.