I was going through some of the misc tools obtained at the NW Regional NAWCC meet and came across a guage with the name "The Bestfit". There are holes of varying sizes along each side 40 to 125 on one side and 85 to 240 on the other. In the center is a diagonal slot marked Ligne with graduations of 2 to 19. See photos. Is it a Ligne gauge? Anyone know how is it used?
Steve