Only 70 Apple 1 computers are known to exist. But collectors gathered twelve of them over the weekend for the annual Vintage Computer Festival West at the Computer History Museum in Mountain View, Calif.

This is no small feat considering the fragility and rarity of the humble machine that launched a computing revolution — and one of the world’s most influential companies.

“They are the computers that started Apple,” Dag Spicer, senior curator for the museum, told Cult of Mac. “People are completely blown away.”

You would have to ride in a time machine back to 1976 and that garage on Crist Drive in Los Altos, Calif., to find 10 Apple 1 computers in the same space.

But this weekend, 10 or more will be displayed at the Computer History Museum in Mountain View, Calif., for the annual Vintage Computer Festival West.

About half the machines will be working.