If anyone can provide any information about this screwback Spange I would be appreciative. The clam shell has fine detail and the Spange is marked "20" just below the anchor pin point. I don't find any exact examples but I think I have seen some a long time ago. Could it be a private purchase Spange by CF Zimmermann of Pforzheim?
Thank you for any opinions.
Thank you for any opinions.
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