The long-awaited ZENITH triple calendar chronograph makes its grand return – and its sharper than ever before. One of the most emblematic variations of the El Primero for over 50 years, ZENITH’s triple calendar chronograph is instantly recognizable for its clean and balanced display of information. In the new Chronomaster Original Triple Calendar, ZENITH is combining the cutting-edge performance of its legendary automatic high-frequency chronograph calibre’s latest incarnation with a triple calendar and moon phase, all in a compact and historically inspired design that’s unmistakably Chronomaster.

One could say that the Chronomaster Original Triple Calendar has been 55 years in the making. A little-known fact that attests to just how advanced ZENITH’s groundbreaking automatic high-frequency chronograph calibre was at the time of its launch in 1969, the El Primero was initially designed to accommodate the triple calendar and moon phase functions right from the very beginning. A series of 25 prototypes was produced in 1970 as a proof of concept, using the same round case as the A386. But given the success of the core chronograph version, it was decided to wait a few years before releasing the first version of the El Primero triple calendar in a watch, which by the 1970s took on a much more space-age design.