It is marked with LDO number L59 on the back under the screw back, which represents Alois Rettenmaier of Schwäbisch-Gmünd. The LDO, was a self-governing organization formed in 1941 which regulated the manufacturing of all German awards. The firm Alois Rettenmaier was partially licensed in the organization, entry number 59. Reverse shows a threaded round nut soldered to the center of the cross, and a removable backing plate with a threaded stud for uniform attachment. Comes in an excellent presentation case.