B66-258 IVORY RULE WITH INTERNATIONAL MARKINGS. Four-fold, 25-1/2". Round brass hinge and tips. The inner face is marked "Meter" and ruled in centimeters (up to 60), the outer face is marked "Swiss" and ruled in up to 20 presumably Swiss units. The edges are marked "Paris" and "London" and measured in French and English inches. Not signed by the maker. Straight and tight with all its pins and very lightly yellowed; all marks crisp and clear. Fine 200-400