New Model – Zenith Grande Chronomaster Open

Featuring a new movement, the El Primero 4021, this 45mm cased chronograph has an opening on the dial that shows the balance, escape-wheel, pallets and seconds wheel.

The power-reserve is displayed along the axis of the hours, making light of the problems of space implied by a 13-lignes calibre measuring 30 mm in diameter and 6.50 mm thick.

The case can be had in steel or pink gold.