Iron cross 1st class by B.H.Mayer's Kunst-prägeanstalt, Pforzheim. Three piece construction with magnetic, iron core. Maker marked on the pin with the PK code of Mayer "26". Mint, unissued condition. All black core finish intact, frame nicely polished and shining like a mirror.  The cross comes in its original black box of issue with cross silhouet on the obverse. 
Top set.