SummaryThe revival silhouette features a 37 mm stainless steel tonneau case derived directly from historical 1969 blueprintsAn in-house El Primero 400 movement operates at 5 Hz to deliver precise 1/10th of a second chronometric measurementThe "chocolate panda" dial utilizes a white lacquered base contrasted by brown-toned sub-dials and matching tachymetric scalesZenith has unveiled the Chronomaster Revival A384 Tropical, a precision-engineered tribute to the world's first automatic, integrated high-frequency chronograph calibre. Reimagined through the lens of controlled aging, the timepiece pairs a compact 1960s architecture with a state-of-the-art El Primero 400 movement to bridge the gap between vintage fidelity and contemporary mechanical robustness.Technically anchored by the El Primero 400 calibre, the A384 Tropical operates at a high frequency of 36,000 VpH (5 Hz). This 278-component, column-wheel movement enables a specialized timing resolution of 1/10th of a second, supported by a 50-hour power reserve. The movement's internal architecture, featuring an openworked rotor shaped as the Zenith five-pointed star, is visible through a transparent sapphire case back — a modern departure from the solid steel of the original.The exterior is a faithful 37 mm reproduction of the tonneau-shaped case introduced in 1969, complete with pump-style pushers and a sophisticated interplay of brushed and polished stainless steel surfaces. The dial execution focuses on a "chocolate panda" configuration, utilizing brown-toned counters that mimic the natural oxidation of rare "tropical" vintage pieces. For enhanced legibility under low-light conditions, the faceted rhodium-plated markers and hands are coated in "old radium" Super-LumiNova, providing a warm patina glow without sacrificing functionality.Furthering its technical heritage, the watch is fitted with the iconic "ladder" bracelet, originally developed by Gay Frères in 1969. This lightweight stainless steel construction reinforces the structural authenticity of the Revival line while offering modern flexibility and comfort. With a water resistance rating of 5 ATM, the piece is as technically resilient as it is aesthetically grounded in horological lore.The Chronomaster Revival A384 Tropical is available now through Zenith boutiques, authorized retailers, and Zenith online.