WHAT DOES SM6 SCHNEIDER MEAN?

According to historic texts, the inch was first acknowledged inside the 7th century as a means of evaluating wound depth. Its initially Formal definition dates from 1324 – a few grains of barley, dry and round, put close to finish, lengthwiseRecord/origin: The expression "inch" was derived from the Latin unit "uncia" which equated to "1-twelfth"