B66-521 SHOOT BOARD. Warren's Improved Mitre Plane. Manufactured by James H. Hall of Nashua and apparently based on John Emery's 1876 patent, which has adjustable fences and more closely resembles the Rogers patent (Lot 520). Who was Warren? No idea. See PTAMPIA I, Figure 180. Features a cast iron track mounted on a 32" wide wooden base with wooden fences fixed at 45 degrees. Plane has two 3-1/2" skewed Charles Buck cutters and turned maple handle. Wood is worn but undamaged, metal clean. There's an original label on one fence which is about 40% legible. From the collection of Harold Unruh. Good+ 1000-2000