{"product_id":"2mm-flat-bottom-domed-mineral-watch-crystal-20-50mm-repair-glass-replacement","title":"2mm  Flat Bottom Domed Mineral Watch Crystal 20-50mm Repair Glass Replacement","description":"\u003cp\u003eRound 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.\u003c\/p\u003e\u003cp\u003eSpecifications\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Mineral glass (heat-treated)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Single dome — domed\/convex top, flat bottom\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 2mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter range:\u003c\/strong\u003e 15mm to 50mm (0.5mm increments)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge:\u003c\/strong\u003e Polished\/bevelled top edge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Clear\/transparent\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of origin:\u003c\/strong\u003e Germany\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 crystal per listing\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAbout this crystal\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThe single-dome (flat-back) design provides a subtle magnification of the dial — a classic trait of vintage and dress watch crystals.\u003c\/li\u003e\n\u003cli\u003eAt 2mm thick, this crystal is well-suited to diver's watch restorations and any case requiring a more substantial glass depth.\u003c\/li\u003e\n\u003cli\u003eMineral glass is significantly harder than acrylic and resists everyday scratches; note that unlike acrylic, mineral glass scratches cannot be polished out.\u003c\/li\u003e\n\u003cli\u003eCan be glued or pressure-fitted using a standard nylon crystal gasket — suitable for both steel and other hard-case materials.\u003c\/li\u003e\n\u003cli\u003eNot sapphire — listed and priced as mineral glass.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCompatibility\u003c\/p\u003e\u003cp\u003eThis is a \u003cstrong\u003euniversal replacement crystal\u003c\/strong\u003e — 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.\u003c\/p\u003e\u003cp\u003eCommonly used to replace crystals in watches from:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSeiko (including Seiko 5 series, SNK801, SNK803, SNK805, SNK809, Seiko Presage, Seiko Cocktail Time — verify your case aperture diameter before ordering)\u003c\/li\u003e\n\u003cli\u003eOrient (including Orient Bambino — verify diameter)\u003c\/li\u003e\n\u003cli\u003eCitizen\u003c\/li\u003e\n\u003cli\u003eBulova\u003c\/li\u003e\n\u003cli\u003eOmega\u003c\/li\u003e\n\u003cli\u003eTissot\u003c\/li\u003e\n\u003cli\u003eHamilton\u003c\/li\u003e\n\u003cli\u003eFossil\u003c\/li\u003e\n\u003cli\u003eLorus\u003c\/li\u003e\n\u003cli\u003eYema (including Yema Rallygraf — verify diameter)\u003c\/li\u003e\n\u003cli\u003eDiver's watches broadly — 2mm thickness is standard for dive watch crystal replacements\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e 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.\u003c\/p\u003e\u003cp\u003eNotes\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAlso suitable for custom watch builds and watchmaking projects.\u003c\/li\u003e\n\u003cli\u003eBuyers 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.\u003c\/li\u003e\n\u003cli\u003ePlease select the correct diameter from the listing variants. If you are unsure, measure twice.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eDispatched from the UK. Please see our store for postage and returns details.\u003c\/p\u003e","brand":"Red 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