Round domed mineral glass replacement watch crystal with a flat bottom and polished bevelled top edge. Available in diameters from 15mm to 50mm in 0.5mm increments, at 2mm thickness. Suitable for use in a wide range of watch repairs, restorations and custom builds.
Specifications
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Material: Mineral glass (heat-treated)
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Style: Single dome — domed/convex top, flat bottom
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Thickness: 2mm
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Diameter range: 15mm to 50mm (0.5mm increments)
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Edge: Polished/bevelled top edge
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Colour: Clear/transparent
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Country of origin: Germany
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Quantity: 1 crystal per listing
About this crystal
- The single-dome (flat-back) design provides a subtle magnification of the dial — a classic trait of vintage and dress watch crystals.
- At 2mm thick, this crystal is well-suited to diver's watch restorations and any case requiring a more substantial glass depth.
- Mineral glass is significantly harder than acrylic and resists everyday scratches; note that unlike acrylic, mineral glass scratches cannot be polished out.
- Can be glued or pressure-fitted using a standard nylon crystal gasket — suitable for both steel and other hard-case materials.
- Not sapphire — listed and priced as mineral glass.
Compatibility
This is a universal replacement crystal — compatibility is determined by diameter. Measure your case aperture (the inner opening of the bezel or crystal seat) carefully before ordering. A tolerance of approximately ±0.1–0.15mm is typical for a press-fit; glue-in installations allow a slightly looser fit.
Commonly used to replace crystals in watches from:
- Seiko (including Seiko 5 series, SNK801, SNK803, SNK805, SNK809, Seiko Presage, Seiko Cocktail Time — verify your case aperture diameter before ordering)
- Orient (including Orient Bambino — verify diameter)
- Citizen
- Bulova
- Omega
- Tissot
- Hamilton
- Fossil
- Lorus
- Yema (including Yema Rallygraf — verify diameter)
- Diver's watches broadly — 2mm thickness is standard for dive watch crystal replacements
Important: Always measure your case aperture before selecting a diameter. Do not order by watch model alone — crystal diameters vary even within the same model range. This crystal is 2mm thick; OEM crystals on many mid-range watches are 1–1.5mm, so this replacement will typically sit slightly higher. Check clearance with your hands and bezel before fitting.
Notes
- Also suitable for custom watch builds and watchmaking projects.
- Buyers searching for a Seiko Hardlex replacement: this mineral glass is a compatible material type, though at 2mm it is typically 0.5–1mm thicker than most OEM Hardlex crystals — verify bezel depth clearance before fitting.
- Please select the correct diameter from the listing variants. If you are unsure, measure twice.
Dispatched from the UK. Please see our store for postage and returns details.
