Original patent specification - F. Jacob in Brunndöbra near Klingenthal i.S., 1892, mouth For Sale
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Original patent specification - F. Jacob in Brunndöbra near Klingenthal i.S., 1892, mouth: $45.94
Patentinhaber: Franz Albin Jacob in Brunndöbra b.Klingenthal i.S. Patent: Mundharmonika mit gegeneinander am: 22.06.1892 Z45