Hmm. I see what Erich means about the shape of the band, which is also evident in the last pic posted, but it could just be the angle, and light. It's possble that aircraft 'L' in the formation pic has been retouched, or the opposite ( 'M' in other words), not so much for censorship purposes, but for public display to the German people at the time. The tutonic 'passion' for a sense of order perhaps dictated that the public should see things in the correct manner, so, why not have the aircraft arranged in alphabetical order? Just a thought.