Refined, reliable, and built to impress — the Seiko Mod Nautilus Open Heart | Black embodies innovation with an iconic, sporty design, representing casual luxury for a sophisticated lifestyle.

The deep black dial delivers a bold yet versatile look, while the open-heart display reveals the mechanical precision operating beneath the surface. Crafted from durable 316L stainless steel, the 41mm case and integrated adjustable bracelet provide a seamless, modern profile built for both comfort and presence.

Powered by the trusted Seiko NH38 automatic movement, this timepiece offers smooth sweeping motion and a 41-hour power reserve — combining premium Japanese engineering with timeless prestige.

Treat yourself to the watch of your dreams.

Stop dreaming. Wear it.

Specifications

• Case Size: 41mm

• Thickness: 12mm

• Material: 316L Stainless Steel

• Bracelet: Adjustable Integrated Bracelet (set included)

• Movement: Seiko NH38 Automatic

• Power Reserve: 41 Hours

• Crystal: Scratch-Resistant Sapphire

• Luminova: Luminescent Hands & Indexes
  
  

  • In the Box

    • 1 × Modified Watch
    • Watch Box
    • Tool Kit
      
      

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

      Disclaimer: VVS Jewelry operates independently and is not affiliated with Seiko, Omega, or any other watch brand. All components and movements are newly sourced from independent specialist suppliers