Iron Cross 1st Class 1939 on Screwback. Maker L/57. Date Variant.

In a very good, barely worn condition. The core with all of the black paint. The ribbing in matt white silver, the flanges burnished and all with some patina. 2nd pattern date variant.
Marked on the reverse with „L/57“ for the company of Boerger & Co. from Berlin. Three piece construction and magnetic. With small hallmark under the anti-rotation pin.
Exactly this cross shown on the website EK-1 DNA.
Extremely difficult to find variant.