York2023-48 LOT OF TWO LEVEL RULES. Lufkin Nos. 2051 and 2071. Both based on Buck's 12/8/14 patent. Both 12", three-fold with the level vial in the middle segment. The 2071 is older, marked "patent pending," has brass binding on the lower edge, worn but legible. The 2051 is marked with the actual patent date, no brass edging, very clean noting one chip from the edge. Good & better 100-200