Special Features
Scardinal mark every fifth div, numerials marking every tenth div, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and100, calibration points marked by red lines centered at 0.333 pct, 0.500 pctand 0.666 pct, marked cal 1, cal 2 andcal 3 in red letters