Answer: lignes

AnswerCrossword Clue
LIGNESSwiss units for watches
lignesunit, 1/40 inch (0.635 millimeter), for measuring the diameter of buttons
lignesLIGNE, a measure of watch movements
lignes(in Swiss watchmaking) a unit equal to 0.0888 inch or 2.2558 millimeters, divided into 12 douziemes: used mainly to gauge the thickness of a movement