UrbanPeel.com: Pin Clock:

"The first ever clock to use a simple yet innovative system of raised pins to display time. Pin clock has a patent pending design.

The face of the pin clock is made up of 3,000 pins arranged side by side. As time passes, a precision engineered mechanism lifts and retracts selected pins to display hours and minutes.

The inspiration behind the pin clock comes from the popular toy that uses moving pins to make an impression of one's hand or face."