7 products
SKX013 Sapphire Crystals for Seiko Mod
Find sapphire crystals for your Seiko SKX013 build at Watch&Style. The SKX013 is the compact 38mm sibling of the SKX007, and a sapphire upgrade replaces the softer factory crystal with a far more scratch-resistant one — keeping the dial clear and sharp over years of wear. This collection covers sapphire crystals sized specifically for the SKX013 case.
Double Dome vs. Flat
The collection covers both main crystal profiles. The double-dome sapphire crystal is domed on both surfaces for a vintage curved look while staying readable from most angles — including a bevel-edge variant and a version made for the NH34 GMT movement's taller hand stack. The flat sapphire crystal sits level for a clean, modern face. Both are sapphire; the choice is aesthetic.
Anti-Reflective Coating
Crystals come with blue or clear anti-reflective (AR) coating. Blue AR adds a subtle blue tint at certain angles for a premium look, while clear AR keeps the crystal fully transparent. Both reduce glare for better legibility under bright light.
Matching Your Crystal
These crystals are sized for the compact 38mm SKX013 and aren't interchangeable with the larger 42mm SKX007, which uses a different crystal size. Crystals are also offered for flat or slope insert profiles, so match the crystal to your insert type for a flush fit. Coordinate with a matching SKX013 bezel and insert, and browse dials and hands to complete your build.
Frequently Asked Questions
Why upgrade my SKX013 to a sapphire crystal?
Sapphire is one of the hardest materials used in watchmaking and far more scratch-resistant than the softer factory crystal. For a watch you wear regularly, a sapphire upgrade keeps the SKX013's face clear and scratch-free over time — a practical, long-lasting mod.
Will an SKX007 crystal fit my SKX013?
No. The SKX013 is the smaller 38mm case, while the SKX007 is 42mm — their crystals are different sizes and aren't interchangeable. Always use an SKX013-specific crystal for the SKX013.
How do I know if I need a "flat insert" or "slope insert" crystal?
It depends on the bezel insert your build uses. The crystal is cut to sit flush against either a flat or sloped insert — match the crystal's designation to your insert profile, or you may see a gap between the glass and the insert. Check the product details for the insert type each crystal is made for.
Browse the full SKX013 sapphire crystal collection above to find the crystal for your build.