1961: (31 years old) Buffett made his first $1 million dollar investment in a windmill manufacturing company.

1961: (31 years old)

• Buffett had seven partnerships operating the entire year.
• The partnerships were: Buffett Associates, Buffett Fund, Dacee, Emdee, Glenoff, Mo-Buff, and Underwood.
• Buffett revealed that Sanborn Map Company accounted for 35% of the partnerships' assets.
• Buffett explained that in 1958, Sanborn sold at $45 per share when
  the value of the Sanborn investment portfolio was $65 per share. This
  meant buyers valued Sanborn at "minus $20" per share, and buyers were
  unwilling to pay more than 70 cents on the dollar for an investment
  portfolio with a map business thrown in for nothing.
• Buffett reveals that he earned a spot on the board of Sanborn.
• Buffett made his first $1 million dollar investment in a windmill manufacturing company.

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