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Zenith DEFY 21 ULTRABLUE ref. 97.9001.9004/81.R946
The El Primero 21 high-frequency chronograph with 1/100-second accuracy with a 44 mm DEFY case in matte titanium paired with a blue and black rubber strap. Its blue-hued automatic movement boasts two independent escapements that oscillate at a frequency of 50 Hz for the chronograph function and 5 Hz for timing.
| movement | El Primero |
|---|---|
| components | 293 |
| frequency | 36,000 alt/hour (5 Hz) |
| power reserve | Min. 50 hours |
| 1/100-second chronograph: – Center chronograph hand making one revolution per second – 30-minute counter at 3 o’clock – 60-second counter at 6 o’clock – Chronograph power reserve indicator at 12 o’clock |
| Hours and minutes at center Small seconds at 9 o’clock |
