Beyond the new caliber, Zenith has updated the Chronomaster Open series with a brand-new case design that measures 39.5mm × 13.1mm, with a lug-to-lug of 45.2mm that should
link help it wear smaller than even the Chronomaster Original. The overall look and feel of the case is
link close to the Chronomaster Sport, with a similar crown, pump pushers, caseband, and
link lug combination, but without the visual and tactile heft of the ceramic bezel.