The reported temperature range numbers don't agree. 130°C to 230°C isn't the same as 220°F to 430°F.
130°C to 230°C converted to fahrenheit should be 266°F to 446°F
If 220°F to 430°F is correct, the temperature for each of the five marks is approximately:
220, 272.5, 325, 377.5, 430°F