Large rough earthenware two-tone bowl, modern artist signed pottery

Rough earthenware pottery bowl, signed by the artist, though we can't make out the signature at all. It's somewhere between 60s and 80s in vintage, judging from other items from this estate, and it's in perfect condition.

This measures 8 1/2" in diameter across the rim, and is 3 3/4" deep. This has a wonderful heavy feel, and we love the two-tone glaze!