White Open Heart - NAUTIKO

The APEX White Open‑Heart is a clean, modern expression of mechanical watchmaking. The bright white dial creates a crisp, minimalist canvas, while the open‑heart window reveals the beating NH38 movement beneath — adding depth, character, and a touch of sophistication. It’s elegant, refined, and effortlessly versatile, with a design that feels premium without trying too hard.

With a 41mm case size and a slim 12mm thickness, the White Open‑Heart wears comfortably on any wrist. Bright C3 lume on the hands ensures visibility in low‑light conditions, while the screw‑down crown, solid case back, and 3 bar water resistance provide practical durability for everyday use.

Hand‑assembled with precision, the White Open‑Heart feels solid, reliable, and built for real‑world wear.

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Key Features

• 41mm case size — modern proportions with confident wrist presence
• 12mm thickness — slim, comfortable, and ideal for daily wear
• Open‑heart dial — showcases the mechanical heartbeat of the NH38 movement
• C3 lume — bright, long‑lasting glow for maximum visibility
• Screw‑down crown — added security and improved moisture resistance
• Solid case back — clean, durable, and built for long‑term reliability
• 3 bar water resistance — protection from everyday splashes and light exposure
• Pure white dial — crisp, modern, and highly versatile
• Reliable NH38 Seiko movement — open‑heart, no‑date, trusted accuracy, and easy servicing
• Hand‑assembled — each piece built with care and attention to detail
• Stainless steel case — durable, refined, and built to last

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Who It’s For

The White Open‑Heart is perfect for enthusiasts who want a watch that’s:

• Clean, modern, and elegant
• Mechanically expressive with an open‑heart design
• Comfortable for everyday wear
• Highly versatile with a crisp white aesthetic
• A refined, confident piece built for real‑world use