Schaedler 12In Single A Rule 46-Im

This rule shows Standard Inches in increments of 64ths of an inch photographically printed along its top edge. It has numbers every 32nd of an inch, every 16th, every 8th and so on for the entire length of the rule. Metric Millimeters & Centimeters, in half-mm markings, are printed along the 30 cm bottom edge. In scientific circles, mm and cm are referred to as metric measurements or SI units (from the French System Internationale). This classic Shaedler Rule, we have placed Printers Points & Picas down the center. Original picas & points still used in the printing