Vtg Studio Art Pottery Ugly Face Mug Artist Signed

This is a vintage Studio Art Pottery artist signed ugly face mug. There is an unglazed area on the rim please refer to the pictures. It is 4" in height and 3.25" and diameter at the base. I do my best list any defects an item might have. If you have any questions please do not hesitate to ask. I source my items. I do not know the items history. I cannot say if a item came from a pet free or smoke-free home or not.