Clocks shown below do not just tell you the time; they act as showcase pieces. Come on, get yourself one of these. (They are excellent conversation starters ;) )
Some capture us just because they are so different:
like for example this clock by Jansen Lye which tells us time not by needles but by its rim.
Tik Tak clock designed by Niels van Eijik and Miriam van der Lubbe tells us the time by arranging the digits of varying sizes on one or more metal arms on the dial, though how, would require more careful examination.