One of the first Apple computers ever built goes on the Christie's auction block in New York next week - and it could sell for half a million dollars (€322,000), or more.
The Apple 1 from 1976 is a forerunner of today's MacBooks, iPads and iPhones.
Ted Perry, a retired school psychologist from California who owns the old Apple, has kept it stashed away in a cardboard box. He said the green piece of plastic covered with memory chips is where the personal computer "revolution" started.
The board was produced by two college drop-outs - Steve Jobs and Steve Wozniak. It first sold for 666.66 US dollars (now €430).
The Apple 1 will be offered online from June 24 to July 9.
Another Apple 1 was sold last month for a record 671,400 dollars (€432,472) by a German auction house.