Wreath: Green Enamel With Cross & Red Center: Hungarian

This is another "Kleindekoration," the device indicating that a ribbon bar emblem represents a Commander neck grade award being worn in "reduced form" here.

This is the Hungarian Merit Order, an all green ribbon which without a device would be unguessable, given the multiple potential awards a German might have had. The device is the center of the Order's cross. As worn by Vizeadmiral Lietzmann.