Bevel edged scale rule. Scales on both faces. Each edge is scaled as follows:
Front face top edge: 1/8" left to right, 1/4" right to left
Front face bottom edge: 1/2" left to right, 1" right to left,
Reverse face top edge: 3/8" left to right, 3/4" right to left
Reverse face bottom edge: 1 1/2" left to right, 3" right to left,