Royal Sei-Oak White - Custom Seiko Mod NH35 Automatic
Authentic Movement (Manufactured by Seiko Instruments, distributed by Time Module Inc)
Exclusive Premium Parts from suppliers of Nagoya, Japan
Assembled by watchmakers with more than +7 years experience
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Free Leather Watch Box- ✓⃝
Watch Tool + Microfiber Watch Clot
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Free Premium Worldwide Shipping - ✓⃝
Including Track & Trace
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Free 6-Months Warranty- ✓⃝
Covers Defects & Malfunctions for Peace of Mind
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30-Day Risk-Free Guarantee- ✓⃝
30 Days To Test Our Products
Upgrade your style game with the Royal Sei-Oak White - Custom Seiko Mod NH35 Automatic. Crafted with a classic and sleek design, this timepiece features a reliable and accurate NH35 automatic movement. The perfect combination of function and fashion, this watch is a must-have for any watch enthusiast.
- Collection: Sei-GMT (Inspired by the GMT-Master of Rolex, a timeless symbol of precision and versatility in travel and exploration).
- Movement: Seiko NH34 Automatic Movement with a 41-hour power reserve and reliable precision.
- Functions: Stop-seconds, manual winding, date function, dual time zone (GMT).
- Bracelet: Jubilee / Presidential / Oyster 316l Stainless Steel Bracelet with a secure deployment clasp and a polished finish, adjustable for a custom fit.
- Case Size: 40 mm, ideal for a bold wrist presence (excluding the crown).
- Case Thickness: 12 mm.
- Caseback: Solid (Steel) or Transparent Sapphire Crystal, showcasing the movement or a sleek, polished finish.
- Crown: Push/pull crown for effortless adjustment.
- Lug Width: 20 mm.
- Dial: Roman Numerals with a classic and elegant aesthetic.
- Hands: Dark/ Blue Hands with a polished finish.
- Lume Type: Luminova on the dial and hands for superior visibility in the dark.
- Water Resistance: 50 meters (5 ATM), perfect for daily wear and light splashes.
- Glass: Scratch-resistant sapphire crystal with anti-reflective coating.
- Weight: 150 grams for comfortable wear.
- Bracelet Adjustability: Adjustable length for a perfect fit from wrist size 14.5cm to 21cm.
- Case: 316L Premium Stainless Steel with a polished silver finish
- Dial: GMT metal dial with applied Luminova markers for enhanced legibility.
- Hands: Four GMT hands, each treated with Luminova for optimal visibility in low-light conditions.
- Bezel: 316L Premium Stainless Steel Ceramic Bezel, designed for durability and style
- Bracelet: 316L Premium Stainless steel butterfly-style bracelet with a polished finish
- Glass: Sapphire crystal with anti-reflective coating
- Caseback: Sapphire crystal with anti-reflective coating or Steel (Solid)
- Watch: Sei-GMT Mod with all specified features.
- Watch Box: Muzi Luxe Black PU Leather Watch Presentation Box.
- Warranty: Muzi Exclusive 6-Months Warranty for Quality Assurance.
- Adjustable Tool: Tool for easy bracelet adjustment.
- Ultra Microfiber Watch Cloth: For maintaining the pristine condition of your watch.
For standard assembly, your watch will be ready in just 2-3 weeks, with assembly taking up to 10 business days.
Need it faster? Priority assembly will have your watch ready in just 5 business days, so you can enjoy it sooner!
Shipping times remain the same for both options:
- Within the Netherlands: 2-3 business days
- Within Europe: 2-6 business days
- International Shipping: 5-10 business days
Plus, enjoy free premium shipping worldwide on all orders over €100, because your luxury watch deserves nothing less.
Regarding Shipping times may vary depending on your location. Check out our shipping policy for more info.
If you're unsure about which case diameter to order, we recommend measuring your wrist with a rope for the best fit.
- For wrists under 17.5cm (6.9"), we recommend a 36mm case.
- For wrists above 19.5cm (7.7"), a 39mm/40 mm and above case would be ideal.
- For wrists in between, both sizes can suit you well—choosing between a larger or smaller watch face ultimately depends on your personal preference. You can also have a look on our Size & Fit Guide.
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Product story
Sei-GMT
The Sei-GMT by Muzi Watches is inspired by the renowned GMT Master of Rolex, a classic in the world of travel watches known for its dual-time functionality and 24-hour bezel. By integrating Seiko’s accurate movement with these distinctive elements, the Sei-GMT is crafted for the adventurer who values style, precision, and the convenience of tracking multiple time zones.
The Beating Heart of Precision
Powered by authentic Seiko movements, known for precision and reliability. This movement delivers consistent accuracy, with an impressive power reserve of 41 hours and a visibility feature that lets you see the mechanism in action.
• Accuracy: -20 to +40 seconds per day
• Power Reserve: Approx. 41 hours
Each detail is carefully chosen to offer both technical excellence and aesthetic appeal, perfect for enthusiasts and everyday wearers alike.
The Muzi Luxe Experience
Luxury Unboxed
Experience the essence of luxury with Muzi Luxe, where unboxing becomes an art. Encased in our premium leather watch box, your timepieces are cradled in plush, protective elegance, reflecting timeless craftsmanship. Delivered in a meticulously designed branded shipping box, every detail, from packaging to presentation, is crafted to elevate your journey and celebrate your refined taste.
Need help?
Frequently Asked Questions
Seiko modding is the art of customizing Seiko watches by modifying components such as the dial, hands, bezel, case, and bracelet. These modifications create a unique, personalized timepiece tailored to individual preferences, giving you a one-of-a-kind watch built on the reliable foundation of a Seiko movement.
A Seiko Mod watch is essentially a customized version of a standard Seiko watch. The term "MOD" comes from "modification," reflecting the changes made to personalize the watch according to specific tastes or needs. Modifications can range from minor aesthetic adjustments to more intricate technical revisions, ensuring that every Seiko Mod is as unique as its owner.
What makes Seiko watches particularly popular for modding is the abundance of compatible spare parts, enabling an extensive range of customization. This wide availability of components allows modders to craft truly distinctive timepieces with nearly endless design possibilities.
No, we are not affiliated with Seiko. While we specialize in crafting custom Seiko mods, our watches are independent creations using Seiko's original movements combined with high-quality aftermarket parts. Our goal is to offer unique, personalized timepieces inspired by Seiko’s reliable foundations, but we operate separately from the Seiko brand itself.
As for the legality of watch modding, it is widely accepted within the watch community, especially for brands like Seiko. Unlike more exclusive brands such as Rolex, where modifications can be restricted or frowned upon, modding Seiko watches is a recognized culture that encourages creativity and personalization. Our mods are created in compliance with industry standards and regulations, offering a safe and legal way to enjoy custom timepieces.
At Muzi Watches, we specialize in crafting high-quality, personalized Seiko mods with meticulous attention to detail. Our watch mods are designed with a perfect blend of premium aftermarket parts sourced from Japan and Authentic Seiko movements, ensuring exceptional quality and durability. Each timepiece is assembled by professional watchmakers, working in our workshop in Amsterdam with more than +7 years experience combining expert craftsmanship with your unique vision to create a truly one-of-a-kind accessory. We are committed to delivering watches that not only meet but exceed your expectations.
If you're unsure about which case diameter to order, we recommend measuring your wrist with a rope for the best fit.
- For wrists under 17.5cm (6.9"), we recommend a 36mm case.
- For wrists above 19.5cm (7.7"), a 39mm/40 mm and above case would be ideal.
- For wrists in between, both sizes can suit you well—choosing between a larger or smaller watch face ultimately depends on your personal preference. You can also have a look on our Size & Fit Guide.
We know you’re excited to get your Seiko Mod Watch, and we’re committed to delivering it as quickly as possible!
For standard assembly, your watch will be ready in just 2-3 weeks, with assembly taking up to 10 business days.
Need it faster? Priority assembly will have your watch ready in just 5 business days, so you can enjoy it sooner!
Shipping times remain the same for both options:
- Within the Netherlands: 2-3 business days
- Within Europe: 2-6 business days
- International Shipping: 5-10 business days
Plus, enjoy free premium shipping worldwide on all orders over €100, because your luxury watch deserves nothing less.
Regarding Shipping times may vary depending on your location. Check out our shipping policy for more info.
At Muzi Watches, we stand behind the craftsmanship of all our custom Seiko mods with a 6-month limited warranty covering defects in movement and craftsmanship. This ensures your timepiece is protected against any manufacturing issues, offering peace of mind with your investment.
For those who want additional security, we offer the option to extend the warranty to 1 or 2 years, ensuring long-term protection for your watch.
What’s not covered:
- Movement issues caused by misuse, such as damage from swimming or showering. While our watches are rated at 5 ATM water resistance, they are designed for everyday water exposure (like rain or splashes), but not for swimming or submersion.
Explore our Warranty Policy to learn more about how we support our products and customers.
Yes, every watchbox includes a professional bracelet adjustment tool, allowing you to easily resize your watch bracelet for the perfect fit. This ensures that you can make quick and convenient adjustments without the need for additional tools or assistance.
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