B66-610 SCREW-ARM PLOW PLANE. E.W. Carpenter Patent. Very clean example of Carpenter's revolutionary 1838 patent. Boxwood body, arms and inner nuts, rosewood wedge and outer nuts, combination boxwood and rosewood fence. There are unfortunately a couple of major chips from the threads, but they are placed so you can cover them with the nuts for display purposes, and the rest of the wood is very clean. The oversized rosewood outer nuts, almost always found badly chipped, have only a few minor dings. The mark is uncommon; it's the D mark without the word "Patent", but has two names underneath it that are in the same lettering but look like users. W. Butcher cutter. Good+ 750-1500