The Twiggy Mac is now a collectors' item, like a rare coin. Dan Farber/CNET In August of 1983, Apple set its sights on a new, micro-floppy 3.5-inch disk drive with 400KB capacity from Sony.

A rare Apple Macintosh prototype from 1983, featuring the "Twiggy disk" drive, is expected to sell for over $100,000 at auction (via New Atlas). The piece of Apple history is set to go under the ...

The #M0001 prototype, dating back to 1983, is the lesser-spotted "Twiggy" model, due to its use of 5.25-inch Twiggy disk drives, instead of the 400K 3.5-inch drives used for the Mac 128.