The investigation covered a period of some 60 years, from 1933 to 1995. Some 254 Swiss banks existing in 1945 were investigated, which covered 82% of the banking system.
The investigation lasted for around 60 years, starting in 1933 and concluding in 1995. Around 254 Swiss banks that existed by 1945 were analyzed, covering roughly 82% of the nation's financial institutions.