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Generic domed round sapphire crystal for Corum Admiral’s Cup 985.641.20, also fits 977.630.20 cases. Blue anti‑reflective coating. High‑quality synthetic sapphire (Mohs 9), scratch resistant. Aftermarket replacement for damaged original crystals.
Domed round with blue reflective coating – reduces glare, premium look
Synthetic sapphire – excellent scratch resistance (Mohs 9)
Precise fit for 985.641.20 and 977.630.20 cases
High optical clarity – maintains dial visibility
Affordable alternative to OEM crystal
| Parameter | Value |
|---|---|
| Compatible models | Corum Admiral‘s Cup 985.641.20, 977.630.20 |
| Diameter | 39.8 mm |
| Shape | Domed round |
| Coating | Blue reflective |
| Material | Synthetic sapphire |
| Hardness | Mohs 9 |
| Type | Aftermarket |
Replace scratched, cracked, or damaged original crystals on Corum Admiral‘s Cup 985.641.20 and 977.630.20.
Professional watch repair and restoration.
Q1: Genuine Corum part?
No, generic aftermarket.
Q2: Which models fit?
Corum Admiral‘s Cup 985.641.20 and 977.630.20. Check your case size before ordering.
Q3: Self‑install?
Professional recommended for water resistance.
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.
