The letters were assigned to the mints as they opened. The mints in Hannover/Vienna (B), Frankfurt am Main (C), and Darmstadt (H) were closed by 1882. After the German separation, D, F, G and J minted coins for the Federal Republic of Germany, while the German Democratic Republic used Berlin (A) and Dresden/Muldenhütte (E) until it closed 1953. Berlin (A) started minting D Mark coins in 1990.
the letters were assigned to the mints as they opened the mints in hannover/vienna (b) frankfurt am main (c) and darmstadt (h) were closed by 1882 after the german separation d f g and j minted coins for the federal republic of germany while the german democratic republic used berlin (a) and dresden/muldenhütte (e) until it closed 1953 berlin (a) started minting d mark coins in 1990