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Sapphire Crystals for Seiko Mod Builds
Every crystal here is sapphire, which is extremely hard, so it resists scratching. Each is made for one watch, so choose your watch first, then double dome or flat.
Crystals by Watch
- SKX007 & SRPD: double dome and flat, many cut for a flat or a slope insert, with NH34 and slim-bezel versions. Some also fit Seiko 5 GMT SSK models, and each names the references it fits.
- SKX013: double dome for a flat or slope insert, bevel edge and NH34 versions, and flat crystals, one made to the original Hardlex's specification.
- SRP Turtle Re-issue: double dome or flat, each fitting the original aluminum insert.
- SRPE: double dome or flat, also listing SRPG and SRPH references.
- SSK023: double dome or flat, also made for the SBSC009.
- SNXS: double dome or flat, blue AR.
Double Dome or Flat
A double dome crystal is domed on both the outside and the inside, which reduces the distortion a single dome gives at the edge of the dial. Many crystals are titled for a flat or a slope insert; see the double dome and flat crystals to choose by profile.
Frequently Asked Questions
Is sapphire scratch-resistant?
Yes. Sapphire is extremely hard, so it resists scratching.
Which crystal do I need for my insert?
Match the crystal to the insert's profile. Many crystals are titled for a flat or a slope insert, and many say on their page which inserts they suit.
Which crystal do I need for an NH34 GMT build?
Choose a crystal that names the NH34: there are NH34 versions for the SKX007 and SRPD and for the SKX013, and the SRPE double dome is the one the SRPE cases call for with an NH34.
What is a double dome crystal?
A crystal domed on both the outside and the inside. The inner dome reduces the distortion a single dome gives at the edge of the dial.
Browse the sapphire crystals above to find the one for your build.