An even numbered set 2 through 20 skipping the No. 14 Pair. All clean, useable planes. Not rated for rarity in AWP, but 2 other examples of this imprint are known. They are 9 1/2 inches long and bedded at 55°. The mark with it's use of lower case letters is similar to that of Benjamin Child of Woodstock, Ct. ca. 1790-1800. There was a  John Child (1755-1834) was the father of Thomas Child, Stoubridge (England) planemaker 1816-1824. The wedge shape would also suggest early England.