Models in this series are comparatively affordable when you consider their quality. Many models also have a tachymeter scale, which is an attractive extra feature. For example, the series includes chronographs with a tourbillon or moon phase display. The Zenith El Primero Chronomaster series excels when it comes to complications.
The sizes of the timepieces range between 38 and 45 mm, with the bigger versions being more suitable for larger wrists. There is also a wide variety of case materials used: You have the choice between rose gold, stainless steel, and durable ceramic. Classic variants with the original case from 1969 are grouped together with models featuring almost completely skeletonized dials, which give you a view of the movement at work. The series, first introduced in 1994, is known for its diversity of designs. It has a balance frequency of 36,000 A/h (5 Hz) and allows you to measure 1/10th of a second. After all, there's a reason the El Primero has a reputation of being Zenith's most powerful caliber. Today, the movement is still considered ultra-precise.
Other manufacturers took advantage of this caliber: Rolex modified it to their needs, renaming it Caliber 4030, and used it in the Daytona. It made history as the first integrated, automatic chronograph caliber. The movement was first introduced in 1969, though its development began in 1962. The Zenith El Primero Chronomaster collection is comprised of many timepieces with different designs, all tied together by their common use of the famous El Primero caliber.
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