It's The Bomba: Bomba Alarm Clock Refreshingly Old

From Gizmodo:

Dutch designer Will Vanden Vos takes an old style and gives it a new look. In much the same way of older clocks and information boards (like the ones you used to find in airports, and still see in many train stations), the Bomba Alarm Clock displays time by dropping the top half of the card down, exposing the number behind. But what's most eye- catching is the exposed machinery.

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