EK2 Hermann Aurich unmarked ( extra rare ) in mint condition

EK2 Hermann Aurich unmarked ( extra rare ) in mint condition
I found this one piece in 25 years and never saw it again. . Presumably, it is a faulty piece, because somehow they did not notice that the 113 marking was not inserted, since all the pieces of this manufacturer that have been found so far are all marked with a PKZ number.