A rare prototype of the original Apple Macintosh featuring a 5.25-inch disk drive instead of the 3.5-inch drive the personal computer eventually shipped with is headed to auction again as part of Bonhams’ upcoming History of Science and Technology collection.

One of two Apple Macintosh prototypes extant and already the most valuable Apple Macintosh to have ever sold at auction, #M0001 is heading for auction at Bonhams’ History of Science & Technology Sale.

A prototype of a vintage Apple Macintosh equipped with a “Twiggy” drive model from 1983 will soon go up for auction, and is expected to go for anywhere from $80,000 to $120,000 (or more) when it goes on the virtual auction block.

A rare Apple Macintosh prototype from 1983, featuring the "Twiggy disk" drive, is expected to sell for over $100,000 at auction (via

A rare Apple Macintosh prototype, known as #M0001 and featuring an early 5.25-inch 'Twiggy' disk drive, is set for auction on October 23 at Bonhams. This prototype is expected to break previous auction records due to the recent surge in prices for early Apple computers.