Makers Mark Signature) On A 1980's Michael Jackson Bust, Need Help.

Hello to all. I'm another newbie so I hope I picked a good place to start my first post. Ive had this life size head and upper shoulders (bust) of Michale Jackson from when I was very young, now about to be 42. I just dug it out after doing some googleing none come to this condition and they dont have the full bust maybe a rubber head. Mine I sispect is ceramic or some sort of hard material like that. It's hollow on the inside but thick. Paint is perfect and color is great. I cant make out the signature of the person who signed it on the rear bottom coat. I'm going to attach pictures so any help anyone can give would be great. Thanks in advance, Billyg.

Okay, I'll say it. It's a terrible likeness.