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Dear Mr. Hanff,
Thank you for posting your request on History Hub!
The whole file will relate to Chile (in class 3, it will be relating to the protection of interests; in class 8 the file will be internal political affairs of Chile). Nazi-agitation may be in 825.00 and 825.00N. 820.00 and 820.00N will broaden the search to all of South America. The Department of State file manual for the Central Decimal File is available at https://www.archives.gov/files/research/foreign-policy/state-dept/finding-aids/manual-1910-49.pdf.
For more information about the Central Decimal File from 1910-1963, please see NARA’s web site at https://www.archives.gov/research/foreign-policy/state-dept/rg-59-central-files/1910-1963.
We hope this is helpful. Best of luck with your research!
Thank you for that information. I have had access to the 825 series, found surprisingly little on the subject pre Claude Bowers era. I will look into the 820s.