0 Calibre 2100 Chronograph, Citizen Watch

The Citizen Calibre 2100 uses the world's most advanced technology. Powered by Citizen Eco Drive technology and built to the high standards expected of Citizen watches, this is the ultimate gents chronograph. 

This chronograph features a precise 1/5 second sweep hand and the first instantaneous zero reset button in an Citizen Eco Drive watch. 
The Citizen Calibre 2100 exemplifies the marriage of inspiration with technology.