1980's Vintage Large 11" Stoneware Pottery Bowl

Beautiful stoneware bowl from the 1980s, most likely purchased at a pottery studio in NH or ME but can't decipher the potter's signature on the back. If anyone recognizes it please let me know. For years I thought it was created by Ed Devlin in Windham, NH but that doesn't seem to be his signature. It's a gorgeous greenish bowl, textured center with a brownish rim. 11" diameter, 2.5" depth. Original owner, never used always decorative, and smoke free home.