I'm in contact with a jeweler in Hanau that might help shed some light on the makers involved in "Arbeitsgemeinschaft der Hanauer Plakettenhersteller". I already managed to identify 2 makers and now I need good pictures of all the jump ring marks on maker 24 EKs to continue. Please help, I will post the combined results of my research here when I have gathered more information.
I'll start with the 2 I have in my collection:
I'll start with the 2 I have in my collection:
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