Regarding the Armament: All pictures I have don't show any shielded mein guns, so my gueass would be the unshielded variant of the 105mm SK L/45 C/32. No concrete idead about the later 88mm varian. Maybe it was the land-based 88mm Flak.
When comissioned by the german Navy, the armament was 2x 83,5mm (original), 2x2 40mm (original), 1x15mm MG (czech), 1 x 7,9mm MG (czech)
While in Athens, 4 more German 15mm MG were taken onboard. Unfortunately, I dont have any information about their location.
After the first refit the armament was 2x105mm (main guns), 5x37mm (two twins at the center), 6x20mm
By 1944 the armament hat changed to 2x88mm (main guns, reduced due to wight issues), 5x37mm (two twins at the center), 13x20mm (two quad mounts on the lower bridge wings)
The Fl-282 Helicopters were only assigned from 11/1942 to 02/1943. Two helicopters were assigned, one as a test vehicle, one as reserve (which remained on land most of the time). Here is a video showing the helicopter operations on
Drache:
Video
I'm a bit sceptical about the camoflage, I couldn't find any fotographs shwoing the ship with anything but a grey paintjob.
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Any help and source material is always welcome.