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There are a lot of retro designs that are being recreated with a modern twist.
The Auto Flip clock costs $35, and is powered by a 9V battery. Gear operated, the flip mechanism comes down every 60 seconds (surprise surprise).
Available at ChinaVasion, the clock's base, spine and frame are all solid metal. The number swatches are fashioned from acrylic, and the turn dial is situated on the right side of the desk clock.