For your consideration, here is a Hi-Shear Metal 6 Inch and Metric Scale, No. 2-612, Copyright 1972, made in the USA.  It is in 1/16th inch and millimeter increments.  It will be mailed in a bubble mailer with foam core stiffeners.  Item pictured is the actual item up for sale, and comes from a non-smoking household.  (416.977r-.5bx2)