Refined, reliable, and engineered to stand out — the Seiknaut Open Heart | Black combines integrated sport styling with dependable automatic performance.

The sleek black dial is complemented by an open-heart window that showcases the movement in motion. Built from robust 316L stainless steel with a balanced 41mm case and adjustable integrated bracelet, this timepiece offers both everyday durability and elevated wrist presence.

Inside, the Seiko NH38 automatic movement delivers smooth operation and a 41-hour power reserve, providing precision, reliability, and mechanical character.

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