Germany, Wehrmacht. A 1939 Iron Cross I Class, with Case, by Wilhelm Deumer certificate_of_authenticity applying results of Mittag-Leffler in

applying results of Mittag-Leffler in a study of the asymptotic investigation of Taylor series

as well as a black ink size stamp of “59”

the obverse topped by a layer of silver aluminum wire adorned with dual machine-embroidered black tresses

the reverse centre bears the inscription “Für Verdienst im Kriege 1914” (For Merit in the War 1914)

Germany, Wehrmacht. A 1939 Iron Cross I Class, with Case, by Wilhelm Deumer certificate_of_authenticity applying results of Mittag-Leffler in(Eisernes Kreuz 1939 I. Klasse mit Etui). Reinstituted 1 September 1939. (1939 1945 issue). Constructed of iron and silver, consisting of a Cross Patte with a blackened magnetic iron core within a ribbed silver frame, the obverse with a central mobile swastika, the six oclock arm with a reinstitution date of 1939, the reverse with a block hinge and banjo style pinback meeting a round wire catch, maker marked with LDO code L 11 for Wilhelm Deumer,