In an old booklet from Squadron/Signal/Podzun Pallas booklet of 1975 this picture was published with the caption (hopefully i somehow correct translate it from German to English): "Even it is unsure, one presumes that this badge shows a stylized emblem of KG 30..."
By crosschecking Ketley and Rolfe as well, i would assume that this emblem merely shows the stylized eagle emblem of KG 53, because the outlook of the bird's head comes more closer to that.
Anyone for a topspin return?
Greets
Norbert