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Generic flat round case back sapphire crystal for JLC Master Eight Days Q1602420. Diameter 32.5mm, thickness 1.2mm, includes matching gasket. Aftermarket replacement for damaged original case back crystals.
Flat round – minimal distortion, clear movement view.
Includes gasket – ensures proper sealing.
Synthetic sapphire – scratch resistant (Mohs 9).
Drop‑in replacement – no case modification.
| Parameter | Value |
|---|---|
| Compatible model | JLC Master Eight Days Q1602420 |
| Diameter | 32.5 mm |
| Thickness | 1.2 mm |
| Gasket | Included |
| Material | Synthetic sapphire |
| Hardness | Mohs 9 |
| Type | Aftermarket |
Replace scratched/cracked original case back crystal.
Professional watch repair and restoration.
Q1: Genuine JLC part? No, generic aftermarket.
Q2: Gasket included? Yes.
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.









