Submariner Deapsea

Seiko Mod Deepsea – 44mm

Built for extreme conditions, the Seiko Mod Deepsea is designed for those who want maximum wrist presence, professional dive capability, and uncompromising durability. Inspired by legendary deep-diving watches, this model features a large 44mm case, extreme thickness, and a helium escape valve—delivering true saturation-diver aesthetics powered by Seiko’s trusted automatic movement.

✨ Key Features

Premium 904L Stainless Steel Case & Bracelet
Heavy-duty, corrosion-resistant construction with a solid, luxury-grade finish built to handle extreme environments.

Reliable NH35 / NH36 Automatic Movement
Seiko’s proven automatic caliber featuring:

• Hacking & hand-winding capability

• Smooth automatic operation

• ~41-hour power reserve
  Built for reliability under pressure.

Helium Escape Valve
Professional saturation-diving feature allowing trapped helium to safely escape during decompression—an essential Deepsea characteristic.

Unidirectional Deep Dive Bezel
120-click unidirectional bezel designed for precise and secure elapsed-time tracking.

Extra-Thick Domed Sapphire Crystal
Inspired by extreme-depth dive watches, offering superior pressure resistance, durability, and a bold Deepsea profile.

44mm Oversized Case with Extreme Thickness
A large, commanding case diameter paired with a very thick profile for true professional tool-watch presence.

📏 Specifications

• Case Diameter: 44 mm

• Thickness: ~16.5–17.5 mm (Deepsea-style proportions)

• Lug Width: 21 mm

• Case Material: 904L Stainless Steel

• Bracelet Options: Oyster or Deepsea-style bracelet

• Bezel Options:

  • Black deep-dive bezel

  • Gradient or two-tone inserts (depending on build)

• Crystal: Extra-thick domed sapphire

• Movement: NH35 / NH36 Automatic

• Water Resistance: 20–30 ATM (build dependent)

• Power Reserve: ~41 hours

⌚ Dial & Functionality

Extreme-Legibility Deepsea Dial
Oversized markers and hands with powerful lume for maximum readability in deep or low-light conditions.

Date Window at 3 o’clock
Clean, functional, and practical for everyday wear despite the watch’s extreme tool-watch build.

Deepsea Bezel Functionality
The unidirectional bezel allows accurate tracking of dive time, essential for deep and saturation diving.

🌟 Why Choose This Seiko Mod Deepsea?
The Seiko Mod Deepsea delivers the full Deepsea experience—44mm case, extreme thickness, helium escape valve, and heavy-duty construction—while maintaining Seiko’s legendary reliability. Designed for enthusiasts who want a bold, no-compromise dive watch, this model offers serious presence, strength, and professional-grade style.