EC, what info that Vintagemore2000 has given you needs to be verified? I think he's "spot on the nose" given the photographic evidence you've given us.
Why is it WFL? WFL, standing for "William F. Ludwig", IS Ludwig prior to around '58 or '59. As stated before around 1960 you could get drums that commonly have hoop-mounted spurs. In fact I remember an early 60s Ludwig set that had hoop-mounted spurs.
The lug outlines on the entire drum is the shape of Ludwig classic lugs. The date inside, in red lettering, appears to be 1954.
The Badge which you pictured looks like an upside-down keystone badge with the top of it torn off.
The mahogany interior shell, unpainted, with wider(than 60s and 70s model Ludwig) maple(?) reinforcement rings on it, appears to be a mid-50s era. More of those older drums had no mounted spurs. The hoop mounted spurs are more common on the older drums. In fact Walberg and Auge produced the accesory hardware for most of the major drum makers at the time, and the only proprietary hardware was the lug shape. Later, in the 60s, they would all start to use proprietary Spurs, T-s and Claws, rail or post mounts, etc..
You're welcome.. ;)