The Aspiral Clock ($540) is a self-spinning timepiece, whose movement drives a ball along a spiral ledge until it reaches the center. The observer can tell the time by looking at the position of the ball. If it’s at the center point between 2 and 3, for instance, then it’s 2:30. Once the ball reaches the center of the clock, it drops into a hole and comes out of the same opening where it originated.
London based Aspiral Clocks offer multiple designs on their site.
Muy buen dìa En donde podria conseguir este reloj en mèxico?. Saludos.