Vintage Studio art buying pottery bowl; hand painted w/tree silouhettes.

buying The bowl features a large size. It has a hand painted design inside with black tree silhouettes against an orange and yellow sky. The bottom center is all black and grass painted at bottom's round. The bowl is all black on underside. The bowl itself is probably hand made; it has a hallmark and a square shape near bowl's bottom; see pics. It's in good condition; no chips or cracks. It has a Halloween vibe. Has many pinholes; especially on underside. Any spots dots lumps are bumps are made that way from being handmade. Measures 3.75" X 12.75".