Custom Nautilus Mod | Black (Open Heart)

🟦 Custom Nautilus Mod | Black | Open Heart | NH38A Automatic | 42mm

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