The Grand Carrera Caliber 36 RS Caliper CAV5115.BA0902 is a mechanical chronograph capable to accurately measure and display time to within 1/10 of a second. This is done using a special Caliper Rotating Scale -Vernier scale- which magnifies the 1/10 scale for easy reading. This watch is powered by caliber Calibre 36RS, a modified version of Calibre 36 / El Primero 400.