B59-400 SLIDE ARM PLOW PLANE. User Made. Very unusual and ingenious design. The arms are solid brass rods, held by cylindrical posts mounted on top of the fence. Since the rods aren't threaded, the maker inserted set screws into the outer nuts to lock them; turns out that wasn't a great idea as both have split. Unusually large with at 11-1/2" long, with an elaborate brass depth stop. Apart from the splits caused by the set screw, it's nice and clean, noting a screw inserted in the side that looks like it was intended to fix a split (although the split isn't obvious). Overall, an intriguing and attractive plow, a testament to some forgotten user's ingenuity. From the collection of John Sindelar. Good+ 300-600