Erik Dennung usually worked in silver-plate and his sterling silver items are quite rare. He was active in the 1960's and worked extensively for the firm of Buch and Deichmann. The bangle is in good condition with light surface wear and good patination. It's adjustable in size and measures 1.2 cm wide x 6cm internal diameter at present. It's set with a natural freshwater pearl in what appears to be a gold bezel (not tested). Stamped internally Erik Dennung Denmark sterling.
If you have any questions please ask, and if you would like to make a sensible offer please email me.