How it's made - ww2 German ring manufacturing
Rule of thumb - all german ww2 rings are die struck.
Below you will find detailed description of manufacturing process. To be able spot out fake/reproduction ring you have to understand both - casting and stamping proceses and must see footprints of each of them. Because in most cases determining originality is question about manufacturing method. And only in case of die struck piece, it is worth looking on design and comparing dies or die flaws with known original items.