The watch’s 38-mm stainless steel case, with pump-style chronograph pushers, replicates the original case of the Ref. These prototype dials were discovered in Charles Vermot’s secret attic. However, unlike that model’s blue-gray-silver combo, these prototype dials, which were apparently never used on a commercial model, featured subdials in three shades of blue. Inside the box was a handful of tricolor dials similar to the one used on the now-familiar Ref.

The story behind the Chronomaster Revival Manufacture Edition, which launched exclusively on Zenith’s recently established e-commerce platform, begins with the discovery of a small, unlabeled box in the now-legendary hidden attic where foresighted Zenith employee Charles Vermot stashed all the company’s El Primero documents and materials to preserve them through the 1970s Quartz Crisis. Zenith Chronomaster Revival Manufacture Edition (Ref. This year, Zenith unveils another vintage-look El Primero homage piece, this one built around a never-before-seen prototype dial discovered in a secret attic of the company’s historical manufacture in Le Locle, Switzerland.

As the crown jewel in last year’s 50th anniversary tribute to its famous El Primero chronograph caliber, Zenith launched a highly period-accurate reissue of the Ref.

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