The Australian architectural firm Clarke Hopkins Clarke designed a clock called "Parallel of Time." As the shapes move, the shorter hands indicate the hour and minutes:
Time is parallel. The speed of time (on earth) is indubitable but everyone’s perception of it is somehow different. Using multiple clocks and cables to create a number of parallelograms, a design is generated: the Parallel of Time. The parallelograms are interconnected, creating an optically illusory axonometric timepiece.
Mechanically speaking, since the hands on every clock (within the same time zone) produce the same angle, the lengths of the connecting cables remain constant as the clocks run. The hour and minute hands are positioned on either side of the glass to prevent cable collisions.
You can watch the clock in action at the first link.
Clock Website and Explanation via technabob
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