Manufactured in the 1930s, this Zenith chronograph is powered by Cal.122 (based on Universal Genève's Cal.281) and features a Staybrite 33mm Calatrava-style case with an exceptionally rare black sandwich dial. Like certain Longines and IWC chronographs from the same era, it was produced using a distinctive two-layer dial construction unique to the period, with the upper dial plate secured by four screws positioned at the top, bottom, left, and right. This unusual manufacturing technique creates a remarkable visual depth unlike either printed or applied-index dials. Among the already scarce sandwich dials of the era, the black version is particularly rare, further enhancing the exclusivity of this outstanding timepiece.
The elegant Calatrava case, distinguished by its refined flat bezel, houses Zenith's Cal.122 movement—developed from Universal Genève's renowned Cal.281 and enhanced with Zenith's own refinements, including beveled components and beautiful Côtes de Genève decoration. The well-balanced proportions, with a 33mm case diameter and 20mm lug width, further contribute to the watch's exceptional appeal.