Authentic luftwaffe button?

[Christophorus]

Good evening,
I stumble across this rare luftwaffe button and I would like to know whether it is genuine or not?
And by the merest chance, does anyone know who worn this type of button?
In advance many thanks for your help,
Christophorus

[Dai]

This type was worn by LW GFM.

[Christophorus]

Thank you very much Dai, it's a good job you were here!
Well understood, button for luftwaffe General Field Marshal.
Gala uniform or daily uniform?