Sea Blue F-91 - Modified Casio Watch

🇺🇸No extra surprises at checkout🇺🇸 – U.S. buyers usually pay no or very low import fees.
Most of our U.S. customers report receiving their watch without any additional charges since the new tariff policy in 2025.
Feel free to reach out to us for any questions :)

We buy only original Casio watches and modify them in-house in Croatia to our customers’ needs and wishes :D

EON “Sea Blue” – F-91W Custom Casio Mod – Transparent White Modified Casio Watch with Blue Gradient Screen – Digital F-91W Mod

⚠️ LEGAL NOTICE
ALL WATCHES SOLD BY EON TIME ARE GENUINE CASIO WATCHES THAT HAVE BEEN MODIFIED BY US.
These are not factory-original Casio products and do not come with a Casio warranty.
EON Time is not affiliated with or endorsed by Casio. All modifications are performed independently by EON Watches.

The Sea Blue Mod brings a fresh aquatic vibe to a classic digital design.

Built from a clear white base, we applied a blue gradient screen filter that subtly shifts tones depending on the angle and lighting. The result is a vibrant but understated look that adds character while maintaining the timeless simplicity of the original design.

Despite its bold screen, this is still a clean, minimalist mod — ideal for everyday wear, lightweight on the wrist, and smooth in appearance.

🔧 Custom Modifications:

Blue gradient screen filter

Precision-installed and tested in-house

Optional upgrades available on request

⚙️ Original Specs (Retained):

Stopwatch

Alarm function

LED backlight

Water resistance: 30m

Approx. 10-year battery life

Case size: 38.2 × 35.2 × 8.5 mm

🛠️ Hand-Assembled by EON Time – Croatia
We disassemble and rebuild new digital watches in our workshop, customizing them piece by piece to bring unique ideas to life. This isn’t a factory product — it’s a handcrafted piece for someone who appreciates small details.

📦 Included in Your Order:

EON “Sea Blue” Mod

Original Casio instruction manual and box (if available)

EON certificate of authenticity

Small bonus gift (sticker, stand, etc.)

No original manufacturer warranty

⚠️ Legal Disclaimer
This is a customized aftermarket product, modified by EON Time. We are not affiliated with Casio or any original brand mentioned or implied.

Modifications include screen polarization and manual part changes.
As a result:

This product is no longer considered factory-original

Descriptive brand/model references are used for clarity only

Each watch may vary slightly due to handmade production

Please allow up to 4 weeks for production before shipping.

🛒 Shop Policies:
Free Battery Replacement
Send it back anytime for a free battery change — especially handy for collectors or long-term wear.

Returns
You can return any item within 14 days if it doesn’t match the listing. Buyer covers return shipping.

Unclaimed Orders
Re-shipping costs €9.60. Refunds will be processed minus original shipping for unclaimed or refused deliveries.

📬 Custom ideas welcome!
Love the blue but want it deeper, lighter, or combined with another color? Just message us — we’re happy to explore a custom build together.