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This generic flat sapphire crystal is compatible with Franck Muller Master Square models, measuring 29.0mm × 29.0mm. 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
Precision fit for Master Square cases
High hardness (9 Mohs) resists daily scratches and wear
Generic design – always verify dimensions with original glass
Length: 29.0 mm
Width: 29.0 mm
Shape: Flat Square
Material: Synthetic sapphire
Compatible Series: Franck Muller Master Square
Replacement crystal for Franck Muller Master Square watches
Suitable for luxury square watch restoration
1.Is this an original Franck Muller part?
No, it is a generic compatible crystal, not OEM.
2.Will it fit my Master Square watch perfectly?
Only if your watch uses exactly 29.0×29.0mm square glass; measure before purchase.
3.Is square sapphire more fragile than round?
Square corners may be slightly more vulnerable; handle with care during installation.
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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