Before the Rockwell tester, the File & Wire mark was used to indicate that the hardness and toughness of a blade had passed the file and wire test. The test consisted of cutting the edge bevel with a new file to test the hardness and then tapping the blade edge through a piece of wire of a known hardness to test the toughness. If the edge was not blunted by the wire, it passed the test and was marked with “File & Wire Tested”. This method and mark was used by Schatt & Morgan for many years and evolved into a brand. Today, the Schatt & Morgan brand is produced by Queen Cutlery in the old Schatt & Morgan factory in Titusville, Pa.
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