Zenith Class

Zenith Class lug width by case size

4 references measured. Updated 2026-10-29.

References that take a different watch strap

• 03.0510.400/04.C491: 20 mm, not the 18 mm of most 40 mm cases
• 03.0510.400/24.C492: 20 mm, not the 18 mm of most 40 mm cases

Other Zenith families

Inside each one the lug width often changes: it is the reference that decides.

• El Primero 170
• Defy 122
• Pilot 64
• Elite 63
• Chronomaster Sport 49
• Revival 46
• Defy Skyline 42
• Chronomaster Original 27
• Defy Extreme 27
• Academy 11
• Chronomaster 3

All Zenith families → · Why the size changes inside a family →