I am also digging up this old thread. I have recently acquired a photo of a wrecked Erla-built Bf 109 G-10 (or G-14/AS) with a three colored RVB and horizontal black bar and the tactical code White 14 or Yellow 14. As far as I am aware, it is a yet unknown one that also wears such a (most likely) blue-white-blue with black horizontal bar marking. The photo will be published in one of my future "Captured Eagles" volumes, so, I can't show it here (I hope you understand!).
I have summarized the known aircraft with such a marking. Except for the blue codes they all match III./JG 300 Staffel colors. Could it be that "blue" was actually "green" and they were 11./JG 300 machines?
Anyway, this I think supports more the theory that when II. and III., IV. Gruppe merged, all aircraft received black horizontal bars. If the former JG 300 aircraft had been transferred to another unit, it would be likely that some of the tactical codes (which would have changed) would have a different style.
Has there been any new insight since the last post about 2 years ago?
Cheers,
Roger
III./JG 300:
9./JG 300 -> YELLOW
Yellow 1 with black border, W.Nr. unknown, location unknown
Yellow 6 with black border, W.Nr. unkown, Munich-Riem
10./JG 300 -> WHITE
White 9 (or Yellow 9), W.Nr. unknown, Selbitz
White 14 (or Yellow 14), W.Nr. unkown, location unknown
11./JG 300 -> GREEN
12./JG 300 -> BLACK
Black 4 with white border, W.Nr. 150816, Langensalza
Black 1 with white border, W.Nr. unknown, Langensalza
IV./JG 300
16./JG 300 -> BLUE
Blue 12, W.Nr. 152027, location ?
Blue 2, W.Nr. unknown, Buchau