Hi Buddecke
You have more then 6 possible commanders in these photos...
A candidate for old Kasta 1 is Oblt Hans-Ulrich von Trotha.........
Oblt Franz Walz, the Bavarian PlM holder was in command of Kasta 2.
Hptm Rudolf Kleine, another PlM holder was in command of Kasta 3.
As you probbaly knew, old Kasta 4 was renamed to Kasta 37 this month. The commander of old Kasta 4 was Hptm Eduard Dransfeld...
The "second" and newer but not the last Kasta 4 was formed in Aug 1916....
One source, GdL (Generalen der Luiftwaffe) have Dransfeld as commander of Kasta 5, but I am unsure about that..........
Hptm Hermann Kastner from FFA 62 took over Kasta 6 in mid Jun 1916, but I dont have any candidate before him.....
A lot of famous names.....maybe someone else have more information...?

Gunnar