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Check out this great Binary Wrist Watch. It’s a true watch for the geek since most won’t be able to read it!
Via: Dangerous Prototypes
“The time setting mode can be entered by holding the left button for two seconds. After that the display is blanked and the time can be set bit by bit by switching through the bits by pressing the left button. If the bit is to be set, the right button has to be held down for one second. The watch automatically enters normal display mode after the last bit has been set (once you’ve gone through all the bits).”