WHAT DOES SM6 SCHNEIDER MEAN?

According to historic texts, the inch was initial acknowledged inside the 7th century as a means of examining wound depth. Its to start with Formal definition dates from 1324 – a few grains of barley, dry and round, put end to end, lengthwiseRecord/origin: The phrase "inch" was derived in the Latin unit "uncia" which equated to "a person-twelfth"