The Zenith Defy El Primero 21 makes its chronograph hand sweep around the dial once every second—a striking display driven by a separate, 50 Hz chronograph regulator. In Felix Scholz’s 2019 hands-on review, the 44 mm titanium watch on a rubber strap felt large but comfortable and light on the wrist. Its appeal is the combination of visible high-speed mechanics and modern sports-watch presence; its size and dated price are important context for anyone considering one.
What makes the Defy El Primero 21 different?
The defining feature is not simply a fast-moving hand. Zenith designed the watch with separate regulating systems for ordinary timekeeping and the chronograph: the current DEFY 21 collection page describes them as operating at 5 Hz and 50 Hz, respectively. The faster chronograph system enables measurement to 1/100 of a second, while the slower system handles the watch’s regular time display. Zenith’s current DEFY 21 collection presents this dual-regulator arrangement as a central feature of the family.
That separation matters in use: the chronograph can run at its high rate without making the ordinary timekeeping system run at the same speed. Zenith’s 2017 launch release describes the central chronograph hand making one rotation per second to drive the hundredths display. The distinctive sweep is therefore the chronograph hand, not the ordinary running-seconds hand. Zenith’s 21 March 2017 launch release describes that one-rotation-per-second display.
For context, Zenith’s official timeline says the original El Primero measured to 1/10 of a second at 36,000 vibrations per hour. The DEFY El Primero 21 followed in 2017, with the brand describing it as a 50 Hz, 1/100-second chronograph. Zenith’s timeline also calls it “the world’s first and only” in its category; that is the manufacturer’s claim, not an independently adjudicated comparison of every watch on the market. Zenith’s illustrated brand timeline provides this historical context.
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How the chronograph works—and how long it runs
In his review, Felix Scholz explains that the chronograph has its own escapement, distinct from the timekeeping escapement. He reports a chronograph escapement rate of 360,000 vibrations per hour and a dedicated reserve indicator at 12 o’clock. The high-speed chronograph has a reported 50-minute runtime when fully wound. That figure is separate from the watch’s ordinary power reserve: Scholz reports at least 50 hours of running time with the chronograph inactive. These are figures reported in the 2019 review, not results from an independent accuracy or endurance test. Felix Scholz’s Time+Tide review, published 16 April 2019, describes the mechanism and its reserves.
Wrist presence: large, but reportedly comfortable
The configuration Scholz reviewed had a 44 mm titanium case and a rubber strap. He summed up his fit impression as “Big, but comfortable,” and said the titanium-and-rubber combination kept it light on the wrist. The open-worked dial and rapidly moving chronograph hand make the mechanics visually prominent, so this is a watch with substantial presence rather than a discreet everyday chronograph. Comfort is Scholz’s individual assessment, not a guarantee that the 44 mm case will suit every wrist.
Price and the variants currently shown by Zenith
Scholz listed the titanium-on-rubber version at A$16,500 in Australia in April 2019. That is a period price for the configuration he reviewed, not a current quote or a universal price. Zenith’s collection page, viewed in the Lithuanian region on 8 October 2026, displays several DEFY 21 entries priced at €15,100, €15,600 and €16,800. Those euro prices apply to distinct entries on that regional page, which includes limited-edition and sold-out labels; they should not be transferred to the exact 2019 titanium-on-rubber watch without matching the reference. Check Zenith’s regional DEFY 21 collection page for the entries and labels it currently displays.
The available information does not establish the exact reviewed configuration’s current price or stock in every market. Zenith’s collection includes multiple variants, and a price comparison is meaningful only after checking the specific case material, strap or bracelet, dimensions, edition status and local availability.
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Who is the Defy El Primero 21 for?
- Consider it if: you want a mechanical chronograph whose 1/100-second mechanism is immediately visible, and you enjoy a large, contemporary sports-watch design.
- Try it on first if: 44 mm watches often feel oversized to you. Scholz found this one comfortable, but his experience cannot predict the fit on another wrist.
- Compare carefully if: you are choosing among current DEFY 21 variants. Confirm the precise reference, materials, included strap or bracelet, edition status, local price and availability rather than relying on a family-level price.
Scholz’s 2019 review is a hands-on account, not a controlled accuracy test or long-term reliability assessment. The evidence here supports the watch’s stated architecture and the reviewer’s fit impression, but not a conclusion about measured timekeeping performance or durability over years of wear.
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