The hard face is gone. Its scrap, In my opinion. Unless its something rare or historically significant .
Good ring does not mean a good anvil but can tell you if a good anvil is cracked.
The ring is a product of the body of the anvil resonating the vibrations produced by the hammer strike. The ring has nothing to do with identifying it as a quality anvil. For example, Fisher anvils have a very good rebound, and very little ring and are considered by some to be the best option as a result.