Lufkin Blacksmith’s Rule

Tempered steel rule – This brings rule to a firm stop when opened straight – Riveted joint has large side washer and a stop – Legible, permanent, deeply etched black markings – Lower edge on one side graduated to 1/16ths of an inch – Upper edge on other side to 1/8ths – Lower edge 75 circumference inches to 1/8ths – For converting diameters directly to circumference measurements