Hello,

This badge is made by Juncker and marked with a half moon, the Royal Crown and "800" (indicating sliver content). This is a controversial set of markings. Most collectors believe that Juncker Prussian Pilot Badges found with a mark of the Royal Crown are not period pieces (1915-1920). The half moon and "800" silver content marks are acceptable, but no Juncker Pilot Badges coming from veteran source or groupings has ever had the Royal Crown mark.

Emedals.ca is a good source for imperial flight badges. Do a search with "Prussian Pilot" and look at the Juncker pieces. They have the half moon and the "800" markings but none of them is marked with the Royal Crown.