Zenith Grande Class Open Concept watch

The Zenith Grande Class Open Concept watch brings an avant-garde, highly technical appearance to the predominantly classical Zenith Class watch collection. With its exciting blend of cutting edge materials, daring design details, and exclusive Zenith El Primero chronograph mechanism, the Grande Class Open Concept has the substance to appeal to watch connoisseurs seeking a luxury timepiece with edge. The foundation of the Zenith Grande Class Open Concept watch's technical appearance is its purposeful, stealthy matte black case. Crafted from titanium, and measuring a formidable 44mm in diameter, this titanium case is water resistant to 50 meters and equipped with a sapphire crystal caseback that permits a view of the movement. The unique skeletonized dial harmonizes perfectly with the black titanium case, revealing the perlage-decorated movement plate beneath it, while the cutout in the upper left-hand side of the dial reveals the pulsing balance wheel and escapement of the movement. Within the case of the Zenith Grande class Open Concept watch can be found a self-winding mechanical movement that is a horological icon. First introduced in original form in 1969 to great acclaim, the Zenith "El Primero" caliber presents a fully-integrated, column-wheel controlled chronograph mechanism, with a balance wheel that oscillates at the uniquely speedy rate of 36,000 alternations per hour. This special technical distinction enables the chronograph to offer timing precision to the nearest 1/10th of a second. The version animating the Grande Class Open Concept watch---the El Primero 4021 J3---also features a power-reserve indicator, certainly one of the most popular small complications in the watchmaking repertoire. The striking style and theme of advanced materials presented by this watch also extends to the elements comprising the movement; for example, the winding rotor is crafted from tungsten carbide. Zenith presents the Grande Class Open Concept watch in two versions, one with a signed rubber strap, and the second with a super-strong and visually compelling 3k carbon fiber strap. Both straps are completed with a triple deployant clasp which is finished in the same manner as the case, and proudly bears the Zenith star.