B66-458 MORTISE GAUGE. Kenny Patent. One of the rarest and most gizmoish of the patented marking/mortise gages, patented by George Kenny of Nashua in 1870. Has its original rosewood and boxwood heads and the often missing trammel points, all marking points sharp. The rosewood head has a large crack, and there are no visible marks remaining on either head, otherwise clean and complete. Good 500-800