ZENITH Chronomaster Open El Primero 3604 Automatic Chronograph 39.5mm Watch Screw-in Crown Montblanc Bonheur Nuit Fountain Writing

Montblanc Bonheur Nuit Fountain Writing Instrument with a combination of shiny and matte black precious resin with yellow gold-coated details

54TWT of round diamonds

star and Interlocking G motifs

The gold-plated stainless steel bracelet is secured by a three-fold clasp with a push-button release

ensuring precision and reliability even during extended dives or adventures

ZENITH Chronomaster Open El Primero 3604 Automatic Chronograph 39.5mm Watch Screw-in Crown Montblanc Bonheur Nuit Fountain WritingThe CHRONOMASTER Open offers a view of the beating heart of the El Primero movement from the dial. Crafted in a sleek 39. 5mm steel case, this version features a matte silver dial with tricolour counters and a transparent counter for the running seconds, paired with an integrated steel bracelet. Powered by the El Primero 3604 1 10th of a second automatic chronograph movement. Pioneering movements deserve to stand out in inspired and unprecedented