Black Wound Badge manufactured by Funcke & Brüninghaus, Lüdenscheid. Made of steel with soldered hardware. The reverse bears the manufacturer’s mark with the LDO code “L/56”, as well as an additional PK number of F&BL “116” stamped on the pin, making this example a rare dual-marked variant.
The badge remains in excellent condition with all glossy black paint intact. The award comes in its original blue LDO case of issue with LDO logo on the inside. 
A very rare dual-marked piece of particular interest to collectors.