Seiko Mod Nautilus – 40mm

Experience the modern luxury and bold architecture of the iconic Nautilus design—reimagined through meticulous Seiko mod craftsmanship. This custom timepiece blends integrated styling, premium materials, and your choice of functional dial configurations for a truly standout watch.

✨ Key Features

Premium 904L Stainless Steel Case & Bracelet
Brushed and polished finishes with an integrated bracelet for an unmistakable luxury-inspired presence.

Multiple Movement Options
Choose the style and complication that matches your personality:

• Chronograph Mecha-Quartz – Sporty and precise, with functional stopwatch subdials.

• NH38 Open-Heart Automatic – A visible balance wheel that showcases the movement’s mechanical heartbeat.

• NH35 Date Automatic – Clean, everyday practicality with a refined date window.

Sapphire Crystal  
High scratch resistance with an anti-reflective layer for better clarity in all lighting conditions.

40mm Contemporary Case Size
Perfectly balanced for modern wear, featuring the iconic integrated-lug profile.

📏 Specifications

• Case Diameter: 40 mm

• Thickness: ~11–13 mm (varies by movement)

• Lug-to-Lug: Integrated design for enhanced comfort

• Case Material: 904L Stainless Steel

• Bracelet: 904L Nautilus-Style Integrated Bracelet

• Crystal: Anti-Scratch Sapphire Glass

• Movement Options:

  • Mecha-Quartz Chronograph

  • NH38 Open Heart Automatic

  • NH35 Automatic (Date)

• Water Resistance: 5–7 ATM (depending on build)

• Power Reserve (Automatics): ~41 hours

⌚ Dial & Functionality

Chronograph Variant
Features functional subdials for timing with a bold sporty aesthetic.

Open-Heart Variant
A beautifully crafted opening—typically at 9 or 6 o’clock—reveals the moving balance wheel.

Date Variant
Classic date window at 3 o’clock for practical everyday use.

Dial Finishes
Available in sunburst, brushed, textured, gradient, or matte finishes—each offering its own unique character.

🌟 Why Choose This Seiko Mod Nautilus?
This custom Seiko mod blends luxury-inspired design with the reliability of Japanese engineering. Whether you prefer the mechanical beauty of an open-heart, the functionality of a chronograph, or the clean practicality of a date model, this Nautilus-style build delivers elegance, sophistication, and modern wrist presence.