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Kiel, Germany, in the northern Schleswig-Holstein region which has a shared history with Denmark. The maker is Jürgen Weiss (1802-1844). He was both married and received citizenship in 1828, which generally coincided with the beginning of a silversmith's career.
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Ref: Bernt Zeitschel, Gold- und Solberschmiede im Östlichen Schleswig-Holstein (Neumünster: Wachholtz, 1998), p. 169, marks Ki99 & Ki100.