Antique
Round Soft Stone Dressing Bush Hammer, Masons Tool.
Head is ~2 11/16" round x 1 1/16" wide. The toothed ring is sitting around a wood base. It is loose but stays in place. The ring base is marked "31" continuously in circle.
Came from an estate, wall displayed highly priced item. Not cleaned/oiled as found.
See detailed pictures.