Much like the original caliber, the Zenith El Primero 4000SC features a power reserve that can last up to 50 hours and an impressive beat frequency of 36,000 vibrations per hour (5Hz).

The El Primero 4000SC is a modern automatic chronograph movement based on the original Zenith El Primero Caliber 400 that was released in 1969. Today, we will be focusing on the El Primero Caliber 4000SC commonly found in Zenith Defy watches. Introducing the Zenith El Primero MovementĬurrently, the Zenith El Primero caliber comes in several forms. For today’s article, let us take a closer look at this iconic watch movement. Hailing from a brand known for supplying top-notch movements to the rest of the industry, the Zenith El Primero is a revolutionary, highly versatile movement that many watchmakers have chosen to rely on, serving as a testimony to its quality. However, you might be surprised to find out that many of these watches actually contain the same age-defining Swiss caliber that packs a whole lot of history: the Zenith El Primero caliber.

There are many brands out there with watches that possess stunning designs and highly capable movements. After all, there is nothing that makes your life easier than a trusty timekeeper that looks gorgeous and provides a consistently reliable performance. As many of us already know, an exceptional watch is always accompanied by a dependable movement.

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