Sidney, thanks for that.
It could very well be any known aircraft with the 'bomb over Africa' motif has it's beginnings with the JG 53 Jabo unit. Possibly it's pilots continued the tradition in recognition of their origins, which would explain why not all aircraft from these reformed units were emblazoned this way?
It is true that the fighter bomber section went through a number of reformations in Africa, and hand me downs continued to carry the emblem. As losses mounted, new aircraft arrived but did not adopt this special graphic. Case in point, here is a photo of an E-7, and Kagero publications put it as belonging to 8./ZG 1. It's arrival I believe was part of the reformation of Jabogruppe Afrika into Sch.G.2, so essentially a third generation aircraft from JG 53, or at least it's pilot??
This leaves me/us back to square one. I'd still like to know the source of Gerhard's illustration.
regards,
Jack