No 2 12 inch 300mm Verulam Civil Engineers Scale Rule
The Verulam range of scale rules are unequalled for clarity and legibility, accuracy and design. The material used is chosen for its toughness and stability. Available in metric and imperial dividings, and 300mm (12") and 150mm (6") lengths.
300mm, 1:5, 1:50x1:10, 1:100, 1:20, 1:200x1:500, 1:1000.