In order for a pilot to receive a higher class of the order he had to have all the other
classes up to it. So, for example, if one had the Gold Cross class with two bars he had to
have the Gold Cross class with one bar and the Gold Cross class.
For Fighter Pilots
Gold Cross class - 40 missions or 2 kills
Gold Cross class with one bar - 60 missions or 8 kills
Gold Cross class with two bars - 100 missions
Knight class - 150 missions or 10 kills
Knight class with one bar - 200 missions or 15 kills
Knight class with two bars - 250 missions or 20 kills