If this Fw 190 on page 69 is from Sonderverband Einhorn as the publisher's caption says, it deepens the mystery of the Staffel’s code system. I've got persuasive evidence (in the shape of contemporary German records and signals deciphered by the Allies) that the aircraft on page 71 is an Einhorn machine though.

I have now had published a far more extensive history of Einhorn and III./KG 200 for which background and source notes can be found here.