ZENITH Chronomaster Original El Primero 3600 Automatic Chronograph 38mm Watch B0F024 this advanced automatic watch features Leather this advanced automatic watch features a 42 hour power reserve and large applied luminous hands and markers to give you an easy read in the dark or underwater The Tacori iconic sculpted crescent design creates a stunning profile on the inner face of the ring Powered by the El Primero 3600 automatic high frequency chronograph movement with 1 10th of a second chronograph function and a power reserve of 60 hours paired with a tri colour dial with its most extensive use of the three iconic shades of grey and blue