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This generic flat sapphire crystal is designed for the Cartier Tank Francaise W51005Q4, measuring 20.0mm × 20.0mm with a thickness of 0.8mm. Its flat square design offers excellent optical clarity and scratch resistance for reliable watch glass replacement.
Flat square shape minimizes optical distortion for clear dial viewing
0.8mm ultra-thin profile for precise case fitting
High hardness (9 Mohs) resists daily scratches and wear
Generic design – always verify dimensions with original glass
Length: 20.0 mm
Width: 20.0 mm
Thickness: 0.8 mm
Shape: Flat Square
Material: Synthetic sapphire
Compatible Model: Cartier Tank Francaise W51005Q4
Replacement crystal for Cartier Tank Francaise W51005Q4
Suitable for luxury square watch restoration
1.Is this an original Cartier part?
No, it is a generic compatible crystal, not OEM.
2.Will it fit my Tank Francaise W51005Q4 perfectly?
Only if your watch uses exactly 20.0×20.0×0.8mm square glass; measure before purchase.
3.Is 0.8mm thickness durable enough?
Yes, sapphire is very hard; 0.8mm provides adequate strength for normal daily wear.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
3,000+ watch movements and parts in stock.
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