Same stippled pattern on the obverse flashing of the somewhat controversial S-Boat with diamonds described in English edition of Weber/Skora's "The Kriegsmarine Awards":
"This piece was first published in Klietmann’s book Auszeichnungen
des Deutschen Reichs 1936-1945 (Motorbuchverlag Stuttgart, 1989). Klietmann considered the badge a genuine period example which was never awarded. It allegedly surfaced in 1965 in Berlin and was reportedly found amongst the ruins of the former headquarters of the Kriegsmarine. The authors were able to examine this example and the badge is pictured on pages 952-953."
"This piece was first published in Klietmann’s book Auszeichnungen
des Deutschen Reichs 1936-1945 (Motorbuchverlag Stuttgart, 1989). Klietmann considered the badge a genuine period example which was never awarded. It allegedly surfaced in 1965 in Berlin and was reportedly found amongst the ruins of the former headquarters of the Kriegsmarine. The authors were able to examine this example and the badge is pictured on pages 952-953."
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