Zenith centers on the high-frequency El Primero. Chronomaster Sport at 41mm × 13.6mm reads the 1/10-second on the bezel; Chronomaster Original 38 reissues the 1969 case. The Defy Skyline at 41mm and 36mm carries the integrated-bracelet line.
| Family | Model | Reference | Diameter | Thickness | Lug-to-Lug | Lug Width | Bracelet Taper | Water | Movement |
|---|---|---|---|---|---|---|---|---|---|
| Defy | Defy Skyline | 03.9300.3620/51.I001 | 41 mm | 10.6 mm | 46.5 mm | integrated | integrated bracelet | 100 m | Cal. El Primero 3620 |
| Defy | Defy Skyline 36 | 03.9400.670/51.I001 | 36 mm | 10.15 mm | 40.5 mm | integrated | integrated bracelet | 100 m | Cal. Elite 670 SK |
| Defy | Defy Skyline Chronograph | 03.9500.3600/51.I001 | 42 mm | 13.6 mm | 47.5 mm | integrated | integrated bracelet | 100 m | Cal. El Primero 3600 |
| Defy | Defy Classic | 03.9200.670/78.M9200 | 41 mm | 10.75 mm | 47.0 mm | integrated | integrated bracelet | 100 m | Cal. Elite 670 |
| Defy | Defy Extreme | 95.9100.9004/26.I001 | 45 mm | 15.4 mm | 52.0 mm | integrated | integrated bracelet | 200 m | Cal. El Primero 9004 |
| Defy | Defy Extreme Diver | 95.9601.9004/26.I001 | 42.5 mm | 15.4 mm | 50.0 mm | integrated | integrated bracelet (rubber) | 600 m | Cal. El Primero 3600 |
| Chronomaster | Chronomaster Sport | 03.3100.3600/69.M3100 | 41 mm | 13.6 mm | 47.0 mm | 21 mm | 21 → 18 mm | 100 m | Cal. El Primero 3600 |
| Chronomaster | Chronomaster Original | 03.3200.3600/69.M3200 | 38 mm | 12.6 mm | 45.5 mm | 19 mm | 19 → 16 mm | 50 m | Cal. El Primero 3600 |
| Chronomaster | Chronomaster Revival Shadow | 97.T384.4061/21.C822 | 37 mm | 12.6 mm | 44.0 mm | 19 mm | 19 → 16 mm (leather) | 50 m | Cal. El Primero 400 |
| Chronomaster | Chronomaster Open | 03.2040.4061/21.C496 | 42 mm | 14.05 mm | 50.0 mm | 22 mm | 22 → 18 mm (leather) | 100 m | Cal. El Primero 4061 |
| Chronomaster | Chronomaster El Primero A386 Revival | 03.A384.400/385.C855 | 38 mm | 12.6 mm | 45.5 mm | 19 mm | 19 → 16 mm (leather) | 50 m | Cal. El Primero 400 |
| Pilot | Pilot Automatic | 03.2430.3620/21.I001 | 40 mm | 12 mm | 47.0 mm | 21 mm | 21 → 18 mm | 100 m | Cal. El Primero 3620 |
| Pilot | Pilot Big Date Flyback Chrono | 03.2430.3652/21.C823 | 42.5 mm | 14.35 mm | 50.0 mm | 22 mm | 22 → 20 mm (rubber) | 100 m | Cal. El Primero 3652 |
| Pilot | Pilot Type 20 Extra-Special | 11.1943.679/93.C813 | 45 mm | 14.25 mm | 52.5 mm | 22 mm | 22 → 20 mm (leather) | 100 m | Cal. Elite 679 |
| Elite | Elite Classic | 03.3100.670/01.M3100 | 40.5 mm | 9.15 mm | 47.0 mm | 20 mm | 20 → 16 mm | 50 m | Cal. Elite 670 |
| Elite | Elite Moonphase | 03.2333.692/78.M2330 | 40.5 mm | 11.45 mm | 47.0 mm | 20 mm | 20 → 16 mm (leather) | 50 m | Cal. Elite 692 |
| G.F.J. | G.F.J. Calibre 135 | 40.1865.135/70.M1865 | 39 mm | 10.5 mm | 46.0 mm | 19 mm | 19 → 16 mm (leather) | 50 m | Cal. 135 |
| Defy | Defy Revival Shadow | 97.A3642.670/21.R946 | 37 mm | 10.75 mm | 44.0 mm | integrated | integrated bracelet | 100 m | Cal. Elite 670 |
| Defy | Defy Zero G | 95.9000.8812/78.R582 | 44 mm | 14.85 mm | 50.0 mm | 22 mm | 22 → 18 mm (rubber) | 50 m | Cal. El Primero 8812 S |
| Defy | Defy Extreme Skeleton | 95.9100.9004/78.R928 | 45 mm | 15.4 mm | 52.0 mm | integrated | integrated bracelet (rubber) | 200 m | Cal. El Primero 9004 |
Specs from the manufacturer's published technical data. Lug-to-lug values reflect commonly-cited caliper measurements where the manufacturer does not publish them and may vary by ±0.5 mm. References cover the principal current production variants per family - bezel, dial, and metal-option references usually share case dimensions.
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