B66-347 CORE BOX PLANE. Lewis Patent. Patented 12/4/66 by Elisha Lewis of Philadelphia. See PTAMPIA I, Figure 276. This is the larger of the two sizes that have been located, 9" long and 7" across. The cast iron fence is intact with the patent date cast into it. The knob that rotates the cutter doesn't engage properly and needs some work if you actually want to use it, but all parts are present; good clean tote. Rated R2 in Larson & Blanchard. Good+ 300-600