Up for auction/buy-it-now is an absolute numismatic masterpiece and a true holy grail for Imperial Germany ("De Empire") registry set collectors worldwide! This stunning 1918-D Half Mark (Munich Mint), struck during the chaotic final year of World War I, is preserved in a legendary, vintage NGC Old Green Rattler Slab.NGC graded this piece over 30 years ago under ultra-conservative, razor-sharp standards. The reverse is an absolute miracle. Exhibits deep, Mirror Finishes that mimic a liquid, mirror-smooth oil slick pool. Incredible contrast with razor-sharp "oil-patina" micro-details! The obverse presents a flawless, highly frosted Satin-Pearl finish. Full, unbroken frosty mint luster on the pearl-rim elements. Completely declasses standard wartime strikes!