Just to add:
Frontflugspange für Kampfflieger is the german name
They came in 3 classes, bronze, silver or gold. Bronze for 20 flights, silver for 60 flights and gold for 100 flights.
A good link regarding fliegerspangen;
http://www.wehrmacht-awards.com/war_...ing_clasps.htm
The one you are showing looks gruond dug, is that right? Unfortunately there are many replicas/copies/fakes on the market, be careful if you are going to buy it.
Best Regards
Peter