No. 1 pattern has 12 different grads, many that are not found on usual rules. This allows the rule to be used for various purposes like laying out and cutting gear teeth.
Satin chrome finish
Graduations: No. 1 – 1/10", 1/20", 1/50", 1/100"; 1/12", 1/24", 1/48"; 1/16", 1/32", 1/64"; 1/14", 1/28"
Rules with single row of inch figures (all rules under 1" width)
Measurement Graduations: 1/10 inches, 1/20 inches, 1/50 inches, 1/100 inches; 1/12 inches, 1/24 inches, 1/48 inches; 1/16 inches, 1/32 inches, 1/64 inches; 1/14 inches, 1/28 inches