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Generic sapphire crystal for Roger Dubuis Excalibur RDDBEX0397. Dimensions: 40.5mm diameter, 2.8mm total thickness, 1.7mm step thickness. Domed round shape with blue anti‑reflective coating. Synthetic sapphire (Mohs 9), scratch resistant. Aftermarket replacement for damaged original crystals.
Domed round with blue AR coating – reduces glare, improves readability
Synthetic sapphire – excellent scratch resistance (Mohs 9)
Precise dimensions: 40.5mm dia, 2.8/1.7mm thick
High optical clarity
Affordable alternative to OEM crystal
| Parameter | Value |
|---|---|
| Compatible model | Roger Dubuis Excalibur RDDBEX0397 |
| Diameter | 40.5 mm |
| Total thickness | 2.8 mm |
| Step thickness | 1.7 mm |
| Shape | Domed round |
| Coating | Blue anti‑reflective |
| Material | Synthetic sapphire |
| Hardness | Mohs 9 |
| Type | Aftermarket / Generic |
Replace scratched, cracked, or damaged original crystal on Roger Dubuis Excalibur RDDBEX0397.
Professional watch repair and restoration.
Q1: Genuine Roger Dubuis part?
No, generic aftermarket.
Q2: Which model fits?
Roger Dubuis Excalibur RDDBEX0397 (40.5mm crystal).
Q3: Is the coating blue?
Yes, blue reflective AR.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
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