Tamer Koseli is a Swiss multidisciplinary designer currently living in Istanbul. Koseli has recently created an unusual wall clock, named Period Clock.
The clock is composed of just three moving circles that indicate the time in a new and intuitive way. The large and medium circles that make up the main clock face rotate to indicate the hour while the smaller circle within the medium hour circle indicates the minutes. It also glows in the dark, making it easy to tell time at night.