Double Dome & Flat Sapphire Crystals for Seiko Mod Builds
Every crystal here is sapphire, which is extremely hard, so it resists scratching. Each one names the watch it's made for: the SKX007 and SRPD, the SKX013, the SRPE or the SRP Turtle Re-issue. Choose the model first, then the profile.
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. A flat crystal is flat on top. Both come with an anti-reflective coating, in blue or clear on most crystals, and red on some.
Match the Crystal to Your Insert
Many crystals here are titled for a flat or a sloping bezel insert, and others say on their page which inserts they suit. Paired with the insert it's made for, the crystal sits with no noticeable gap between it and the insert. Some flat crystals fit the watch's original aluminum insert, and some double domes don't, so check the crystal's own page against the insert you're keeping.
NH34 GMT, Cyclops & Other Options
- NH34 GMT movement: several SKX007/SRPD and SKX013 crystals have the clearance for it, and say so in the title or the details.
- Cyclops: some flat SKX007/SRPD crystals come with or without a magnifying lens.
- Seiko 5 GMT: some SKX007/SRPD crystals also fit Seiko 5 GMT SSK models, and each names the references it fits.
Crystals by Model
For one model at a time, see the SKX007 & SRPD, SKX013, SRPE and SRP Turtle sapphire crystals, or every crystal in sapphire crystals.
Frequently Asked Questions
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.
Which crystal do I need for my insert?
Match the crystal to the insert's profile. Many crystals here are titled for a flat or a slope insert, and paired with that insert there's no noticeable gap between the two. Many also say on their page which inserts they suit.
Will these fit my watch's original aluminum insert?
Some will. The crystals made to fit the original aluminum insert say so on their own pages, as the SRP Turtle Re-issue crystals do. The SKX007/SRPD Double Sapphire Crystal for Slope Insert and the SKX007/SRPD Double Dome Sapphire Crystal for Slim Bezel don't fit the SKX007's original aluminum insert.
Is sapphire scratch-resistant?
Yes. Sapphire is extremely hard, so it resists scratching.
Browse the double dome and flat sapphire crystals above to find the one for your build.