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Generic domed round sapphire crystal for JLC Master Control Q1392420, also fits Master Calendar 176.2.12 / 176.8.12.S. Diameter 32.5mm, total thickness 1.9mm, step thickness 1.0mm, blue reflective coating, includes matching gasket. Aftermarket replacement for damaged original crystals.
Domed round with blue AR coating – reduces glare.
Includes gasket – ensures proper sealing.
Synthetic sapphire – scratch resistant (Mohs 9).
Drop‑in replacement – no case modification.
| Parameter | Value |
|---|---|
| Compatible models | Q1392420, 176.2.12, 176.8.12.S |
| Diameter | 32.5 mm |
| Total thickness | 1.9 mm |
| Step thickness | 1.0 mm |
| Coating | Blue reflective |
| Gasket | Included |
| Material | Synthetic sapphire |
| Hardness | Mohs 9 |
| Type | Aftermarket |
Replace scratched/cracked original crystal.
Professional watch repair and restoration.
Q1: Genuine JLC part? No, generic aftermarket.
Q2: Gasket included? Yes.
Q3: Coating blue? Yes.
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.
