From 1962 to 1967 he worked as an art director for a German bank and some industrial companies.
In 1979, he went to work overseas for a German bank.
The challenge followed the decision by the German central bank to lower interest rates.
Second, three officials of the German central bank said that interest rates could stand to be lowered again.
The German central bank also left its full set of interest rates unchanged at record low levels.
For now, a stock analyst at a big German bank said, no one wants to buy dollars.
The figures included data from eastern German banks for the first time.
That would be the third such rise in eight weeks by the German central bank.
As a result, all German banks had to close temporarily.
The German central bank cut two interest rates by half a percentage point a week ago.