FORTUNE — It was Piper Jaffray’s Gene Munster who compared the iPhone 5 to a Rolex — and all other smartphones to Timexes.

But it was Apple AAPL design chief Jony Ive who showed the press how the company achieves what he likes to call the device’s “extraordinary level of fit and finish.”

No one can make an assembly line sound as sexy as Sir Jony, although he’s demonstrating processes almost certainly developed by Bob Mansfield, the company’s under-appreciated senior vice president for manufacturing.

The 1:36 minute YouTube video above was excerpted from the 7-minute iPhone 5 film shown at the device’s unveiling last week and now available here at

The excerpt was posted at the request of reader “apppletini,” who says she almost passed out when Ive began talking about grinding the chamfers with diamond crystals.