The Apple-1, a circuit board hand-built by Apple co-founder Steve Wozniak, was made in 1976, and sold at the time for $666.66. About 200 units were produced, but by Sotheby's estimate, only 50 survive. Six, including the one sold today, are known to be in working condition.

Included with the Apple 1 lot was an original cassette interface -- cassette tapes were used to store programs and data -- and several manuals, including a rare BASIC user's manual.

The four-page Jobs-authored memo , also significantly higher than the auction house's preliminary estimate of $10,000 to $15,000.

That memorandum and an accompanying one-page addendum were written by Jobs in 1974 during a short stint with game-maker Atari, and included his suggestions for improvements on World Cup, a coin arcade game of the time. The lot featured three original circuit diagrams drawn by Jobs in pencil and the one-page hand-written addendum.

Although both the Apple 1 and the memo sold for well above their estimates, neither came close to the paid by a Miami executive last year for the original contract that marked Apple's founding. Jobs, who died in October 2011, Wozniak and the lesser-known Ron Wayne drew up the contract in April 1976.