Germany – Federal Republic – One Mark – 1956 J – KM-110 – NGC – About Uncirculated 58 – This coin is listed in the Standard Catalog of World Coins as KM-110 and has been authenticated, encapsulated and graded About Uncirculated 58 by Numismatic Guaranty Corporation (NGC), universally recognized as one of the top third-party grading services in the United States.