Maj Christoph Prinz Von Hessen
 

I have some information from some notes I got from a book "Royals and the Reich" Jonathan Petropoulos. They deal with Maj Chistoph Prinz Von Hessen best known to us as the Ia of JG 53. I am not sure of there accuracy the author has his promotions:
Ltn Oct 1939
Obltn May 1940
Hpt Sep 1940
Maj Apr 1943

Decorations:
EK2 15 may 1940
EK1 March 1942

Nov 1939-Jul 1941 was on the staff of General B Loerzer
He appears to have flown 18 sorties in Russia in 1941

I hope this is of use or interest.