KARL
ZACH Founded 1899
Arts & Crafts Ring 
Two colour gold with opal doublet
Length: 2.2cm Width: 2.1cm
Marked: ‘585’ & ‘KZ’
Viennese. Circa 1930
Literature: cf. Wiener Gold-und Silberschmiede
und
ihre punzen 1867-1922,
Waltraud
Neuwirth, Lexicon L-Z page 289
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