This firm still exists, it is currently summarised: "The company WILHELM KÖHLER VERLAG GMBH & CO. KG, is a Wholesaler, founded in 1865, which operates in the Printing and setting - machinery and equipment industry. It is based in Minden, Germany."
WKB 912
WKB 912 rev
full name on W.K.B.a.Rh.2160 B
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