Refined, reliable, and built to impress — the Seiko Mod Nautilus Open Heart | White blends modern sport-luxury styling with mechanical character. Featuring a clean white dial and an open-heart display, this 41mm timepiece showcases the movement in action through a visible front window, creating depth and visual intrigue.

With no date window, the dial remains balanced and uncluttered, emphasizing symmetry and refined detailing.

Performance & Movement

Powered by the NH38 automatic movement (open heart), this watch delivers smooth sweeping seconds and reliable mechanical performance. Designed for durability and everyday wear, the exposed balance wheel adds a dynamic focal point to the dial.

Specifications

• Diameter: 41mm

• Thickness: 12mm

• Movement: NH38 Automatic (Open Heart)

• Glass: Sapphire crystal (anti-scratch)

• Case: 316L stainless steel

• Luminova: Yes

• Crown: Screw-down crown

• Bracelet: 316L stainless steel with butterfly clasp

• Lug Width: 13mm

• Wrist Size: Adjustable from 14.5cm to 22cm

• Case Back: Transparent (visible movement) or Steel (closed back)
  
  
  

  All watches are assembled by hand. Please allow 3–5 business days (excluding weekends) for assembly prior to shipment. Processing times may extend during peak periods.

  In the Box

  • 1 × Modified Watch

  • Watch Box

  • Tool Kit

  Disclaimer: VVS Jewelry operates independently and is not affiliated with Omega or any other watch brand. This is a Seiko mod watch built using an original Seiko movement and high-quality aftermarket components. Specifications and finishing may vary slightly due to handcrafted assembly.