Interesting '73 Studio Pottery Vase - Help With Signature?

This is the one I'm really curious about. I'm on an art pottery binge so I took a chance for $15.

All I can make out is '73 next to the name. It looks like a "real" studio piece and not just a ceramics class job (or maybe I'm being too optimisitic :[ ). I posted it on 20thCenturyForum too since they have some real knowledgable people regarding art pottery.

I did the baking soda trick and was wondering if anyone with a better eye could help me? Does anyone recognize the work? I think I can see "DIBBI"