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Generic pan‑shaped sapphire crystal for Zenith El Primero Chronomaster 18.0240.4021. Diameter 31.5mm, total thickness 3.1mm, step thickness 1.0mm, blue reflective coating. Aftermarket replacement for damaged original crystals.
Pan shape with blue reflective coating – reduces glare.
Synthetic sapphire – scratch resistant (Mohs 9).
High optical clarity – maintains dial readability.
Precise dimensions – drop‑in replacement.
Affordable alternative to OEM.
| Parameter | Value |
|---|---|
| Compatible model | Zenith 18.0240.4021 |
| Diameter | 31.5 mm |
| Total thickness | 3.1 mm |
| Step thickness | 1.0 mm |
| Shape | Pan (stepped) |
| Coating | Blue reflective |
| Material | Synthetic sapphire |
| Hardness | Mohs 9 |
| Type | Aftermarket |
Replace scratched, cracked or damaged original crystal on Zenith El Primero 18.0240.4021.
Professional watch repair and restoration.
Q1: Genuine Zenith part? No, generic aftermarket.
Q2: Does it include a gasket? No, use original or purchase separately.
Q3: Quality reliable? Yes, from reputable suppliers.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
3,000+ watch movements and parts in stock.
Trusted by watchmakers worldwide.
Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.









