PALO ALTO, California — The first iPhone “prototype” was strung together using bits of wood, duct tape and some old Polaroid lenses.

Key members of the Apple team reminisced about those early DIY efforts Wednesday night during a discussion led by Brian Merchant, author of The One Device, a new book about the birth of the iPhone.

“This thing was really kludged together,” said Brian Huppi, a former Apple engineer who helped build the first system. “It was built out of wood, duct tape and old lenses from the ’60s.”

One day in early 2005, interface designer Bas Ording was sitting in a secret, windowless lab at Apple HQ when the phone rang. It was Steve Jobs.

The first thing Jobs says is that the conversation is super-secret, and must not be repeated to anyone. Ording promises not to.

“He’s like, ‘Yeah, Bas, we’re going to do a phone,'” Ording told Cult of Mac, recalling that momentous call from long ago. “‘It’s not going to have any buttons and things on it, it’s just a screen. Can you build a demo that you can scroll through a list of names, so you could choose someone to call?’ That was the assignment I got, like pretty much directly from Steve.”