Graduations Metric:
247P Model: 1:20, 1:33 1/3, 1:40, 1:50, 1:100
740PM Model: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125
742PM Model: 1:100, 1:200, 1:250, 1:300, 1:400, 1:500
743PM Model: 1:100, 1:200, 1:300, 1:400, 1:500, 1:600
744PM Model: 1:2.5, 1:5, 1:10, 1:20, 1:50, 1:100
748PM Model: 1:20, 1:25, 1:33 1/3, 1:50, 1:75, 1:100