ZENITH DEFY EL PRIMERO 21 ULTRABLUE 44 MM

The El Primero 21 1/100th high-frequency chronograph in a 44 mm matt titanium DEFY case, combined with a blue and black rubber strap. Its blue-finished automatic movement features two independent high-frequency escapements beating at 50Hz for the chronograph function and 5Hz for timekeeping.

Reference: 97.9001.9004/81.R946