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All-plastic watch movement from the 70s

Cory Doctorow at 11:50 pm Mon, Nov 6, 2006

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Here's an in-depth look at Tissot's "Synthetic" watches, the first analog watch-movements made (almost) entirely from plastic. They're quite striking -- some even included calendars.
The escapement is a conventional in-line Swiss lever type, but with all parts made from plastic, excepting the impulse pin. This is synthetic ruby, and is the one-and-only jewel the movement contains. The balance is provided with shock protection. Tissot designed a special shock protection device for this watch. It is similar to the Incabloc system, but the balance pivot runs in a 1-piece molded bushing. This is centered in a conical metal carrier by a 3 armed spring, visible on the top of the bearing.
Link (via Watchismo)

I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.

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