Silver Seiko watch with black face on a white background

Nautilus | Black (Open Heart)

$349.00 $449.00
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Silver Seiko watch with black face on a white background
  • Silver Seiko watch with black face on a white background
  • Nautilus | Black (Open Heart)
  • Nautilus | Black (Open Heart)
Nautilus | Black (Open Heart)

Nautilus | Black (Open Heart)

$449.00 $349.00
Details

This custom‑built Nautilus‑style wristwatch is assembled in the USA using all new, high‑quality components. Featuring a striking open‑heart black dial, this model showcases the movement through a precision‑cut aperture, adding mechanical character and visual depth to the iconic Nautilus design.

Powered by the Japanese NH38A automatic movement, this watch delivers smooth, reliable performance with a clean, no‑date layout ideal for open‑heart builds. The refined 316L stainless‑steel case and integrated bracelet give the watch a modern luxury presence, while the polished center links add a premium finishing touch.

Premium components such as a sapphire crystal, transparent exhibition caseback, and 30m water resistance make this timepiece suitable for everyday wear. This open‑heart Nautilus homage is a standout piece for collectors who appreciate craftsmanship, mechanical artistry, and contemporary style.

Specifications

  • Movement: Japanese NH38A Automatic (Open‑Heart, No‑Date)
  • Case Material: 316L Stainless Steel
  • Case Back: Transparent Stainless Steel with Crystal
  • Crystal: Sapphire
  • Water Resistance: 30m
  • Strap: Integrated Stainless‑Steel Bracelet with Polished Center Links

Dimensions

  • Case Diameter: 42.0mm (without crown)
  • Case Length: 48mm (lug to lug)
  • Case Thickness: 12.0mm
Production & Shipping
  • Hand‑assembled in the U.S. with meticulous care
  • Ready to Ship models dispatch within 3 business days
  • Standard build time: 3–12 business days
  • Delivery: 2–5 business days via selected carrier
  • Special orders/out‑of‑stock pieces may take up to 12 business days; you’ll be notified if additional time is required. We will work quickly to ship your order as soon as possible.
  • Once your order has shipped, you will receive an email with further information. Delivery times vary depending on your location.
Return & Refund Policy

All our quality watches backed by a money-back guarantee.
No Brand Affiliation

Sunshine Watch Co. has NO affiliation or connection with Seiko or endorsed by, or connected to Seiko Company or any of its subsidiaries.

Our timepieces are custom creations featuring movements from TMI (renowned for its accuracy and dependability and used in millions of watches worldwide)

Our timepieces are independent products and are not in any way associated with Seiko.

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