Seiko Crystals

Genuine Seiko Watch Crystals - Sapphire, Mineral, Hardlex and Acrylic

Shop genuine replacement crystals for Seiko watches at WatchPlaza. We stock original Seiko crystals for a wide range of models and calibres, from current production references to older and discontinued models, serving both professional watchmakers and watch enthusiasts.

Related Collections
→ Seiko Watch Parts - The full Seiko parts catalogue
→ Seiko Bezels - Bezels & inserts
→ All Watch Crystals - Crystals for other brands

Original Seiko Crystals for Every Model

The crystal is one of the most important components of any watch, protecting the dial and hands while defining the clarity and character of the watch face. Over time, crystals can become scratched, cracked or clouded, and replacing a damaged crystal is one of the most common watch repairs. At WatchPlaza, we stock genuine Seiko crystals designed to fit specific Seiko models, ensuring correct dimensions, curvature and fit.

Using a genuine Seiko crystal maintains the original specifications of the watch, including the exact diameter, thickness and profile required for a secure fit and proper water resistance. This is particularly important for dive watches and other models where crystal sealing directly affects water resistance ratings.

Seiko Crystal Types

Seiko uses several different crystal materials across its range, each with distinct properties.

Hardlex

Hardlex is Seiko's proprietary mineral crystal, used across much of the brand's range including the popular SKX, SRP and Seiko 5 lines. It offers a strong balance of scratch resistance and shatter resistance, and is more forgiving under impact than sapphire.

Sapphire

Sapphire crystals are used on higher-end Seiko models, including much of the Prospex, Presage and Grand Seiko ranges. Sapphire offers exceptional scratch resistance and clarity, making it the premium choice for many enthusiasts. Replacement sapphire crystals are available for a range of models.

Mineral Glass

Standard mineral crystals are found on many entry-level and vintage Seiko models. They offer good scratch resistance at an accessible price point and are widely available for older references.

Finding the Right Crystal

Selecting the correct crystal depends on the exact model and reference of your Seiko watch. Crystals vary in diameter, thickness, curvature and edge profile, and even small differences affect fit and sealing. Each crystal in our catalogue is listed with dimensions and model compatibility to help you identify the correct component before ordering.

If you are unsure which crystal fits your watch, the case number on the case back is the most reliable reference. Searching by model or case number on our site will return the crystals listed as compatible with that reference.

Crystals for Vintage and Discontinued Seiko Models

Alongside crystals for current production models, we stock replacement crystals for a significant range of older and discontinued Seiko references. Vintage crystals can be difficult to source through standard channels, and our archive includes components for models that have been out of production for many years. If you are restoring a vintage Seiko or replacing a crystal on a discontinued reference, our catalogue is a reliable starting point.

If the specific crystal you need is not listed, contact us directly to request a part. In many cases we are able to source components through our supply network, though availability and lead times vary.

Professional Installation Recommended

Crystal replacement requires proper tools and technique, particularly for pressure-fit crystals and models where the crystal contributes to water resistance. For dive watches and water-resistant models, we recommend professional installation by a qualified watchmaker, followed by pressure testing to confirm the seal. Correct gasket fitting and seating are essential to maintain the original water resistance rating.

Explore More Seiko Parts

→ Seiko Watch Parts - Complete Seiko parts catalogue
→ Seiko Movements - Calibres and movement components
→ Seiko Bezels - Bezel inserts and chapter rings
→ Seiko Brand - About Seiko as a brand