The concept of an open heart dial isn't new, but it's not necessarily popular. Over the past few decades, watch snobs have ditched open dials, as they are often found on low-end mechanical watches, sometimes as replicas of tourbillons, or placed seemingly at random. While the luxury market prefers pure cutout, Zenith is making a bold move to restore the open-mindedness that has proven itself to be a master at cutout. The latest addition to the Zenith Chronomaster Open series offers features in every way, while tightening the proportions and retaining more.
The first thing to notice at the Zenith Chronomaster Open is that it's not just the balance wheel on display. The rest of the escapement is visible - the component that controls how the power from the mainspring is released and regulated to chrono beats. Meanwhile, three circular cutouts are layered on top of each other, making the usual Chronomaster triple-register sub-dial look like a column of gears. Given that the movement components are silver, the grey subdials retain the tri-tone theme. Running seconds is still very useful due to the polymer disc with printed markings covering the cutout.high quality copy watches
Aside from the open heart, the rest of the Zenith Chronomaster Open dial is captivating, with a bright sunburst blue reminiscent of a clear sky. The chapter ring is marked to allow you to time accurately to the tenth of a second, while the other printed minute markers remain around the perimeter of the dial. Some applied hour markers, filled with black and luminous parts, had to be removed to make way for an open heart, so white printed squares were replaced at 9, 10 and 11. The Zenith El Primero logo and star also had to be off-centre, but the dial remained balanced.
In terms of size, the Zenith Chronomaster Open follows a new generation of smaller Chronomaster sizes. It measures 39.5mm in diameter and 13.1mm thick, although the lug-to-lug length is still relatively long at 45.2mm. Regular wrists won't contend with this watch, but those with smaller wrists may find it a little dangling. The case oscillates between sportiness and elegance, with the polished bezel and chamfered edges contrasting with the brushed finish.Replica Franck Muller
The movement is of course El Primero – specifically the 3604 movement, with integrated automatic winding, a high beat frequency of 36,000 beats and a power reserve of around 60 hours. The escapement uses silicon for the escape wheel and pallet lever, which improves durability, friction and anti-magnetic properties. You'll never get used to seeing the central seconds hand move so fast, allowing you to make these measurements accurate to the tenth of a second.
Brand Zenith Model Chronomaster Open Boutique Edition Case Dimensions 39.5mm x 13.1mm x 45.2mm Case Material Stainless Steel Water Resistance 100 Metres Crystal(s) Sapphire Dial Blue with open heart Lug Width 20mm Strap Steel bracelet Movement El Primero 3604 Power Reserve 60 hours