B65-612 SLITTING GAUGE. Kinney Patent. One of the rarest of the patented slitting gauges, far less common than the Rice patent. Patented in 1880 by Cyrus Kinney and sold by Sandusky Tool Co. PTAMPIA I, Plate 23, There's a split that runs through the center of the body, but otherwise very clean. From the collection of David Jeffers. Good 200-400