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Generic sapphire crystal for Cartier Ballon Bleu WSBB0021. Diameter 29.0mm, total thickness 3.5mm, step thickness 0.8mm. Fits 37mm case. Synthetic sapphire (Mohs 9), scratch resistant. Aftermarket replacement for damaged original crystals.
Domed shape with blue AR coating – signature Ballon Bleu design, reduces glare
Synthetic sapphire – excellent scratch resistance (Mohs 9)
Precise dimensions: 29.0 × 3.5 × 0.8 mm
High optical clarity – maintains dial visibility
Affordable alternative to OEM crystal
| Parameter | Value |
|---|---|
| Compatible model | Cartier Ballon Bleu WSBB0021 |
| Case size | 37 mm |
| Crystal diameter | 29.0 mm |
| Total thickness | 3.5 mm |
| Step thickness | 0.8 mm |
| Material | Synthetic sapphire |
| Hardness | Mohs 9 |
| Type | Aftermarket |
Replace scratched, cracked, or damaged original crystals on Cartier Ballon Bleu WSBB0021 (37mm case).
Professional watch repair and restoration.
Q1: Genuine Cartier part?
No, generic aftermarket.
Q2: Does it fit other 37mm Ballon Bleu models?
Designed for WSBB0021. Measure your original crystal 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.
