Mastercook knob scale

A scale for the knob of an old Mastercook stove. Scaled (50, 100, 150, 200, 250 Celsius) for my parents stove (over 10 years old), I think it might work similarly on a stove of the same age :) Knob hole dimensions: Width: 10.9 mm Height (from the flat surface to the tip of the rounded part): 9.8 mm