Only German periods of coverage are used to determine the amount of German benefits,
                  even when entitlement is based on combined U.S. and German coverage.
               
               Exception: If a worker has credit for less than 6 U.S. QC's but is insured for a German benefit
                  (with or without totalization), the U.S. QC's may be used to increase the amount of
                  the German benefit.