Ohio Pottery but WHICH?

Purchased in Zanesville Ohio this 7 1/2" diameter bowl is MARKED with a hand-incised mark; mark is filled with glaze. Bottom shows the typical deep yellow gold Ohio clay. The glaze (see closeup) is a bit mottled. Does anyone recognize the signature mark? I looked at list of Weller signatures and some others (Rookwood) but couldn't match. Hope someone else can identify it. THANKS!