B66-601 IVORY-TIPPED PLOW PLANE. Ohio Tool Co. No. 109. Solid ebony throughout and very clean, threads nearly intact with only a couple of old chips that are nearly invisible. Four flat ivory tips with turned balls, lightly yellowed with a few cracks. One significant chip from the bottom of the skate at the toe, otherwise only a few minor dings. Sandusky cutter. "A" mark without the model number. From the collection of David Jeffers. Fine 300-600