Royal Blue Open Heart - NAUTIKO

The APEX Royal Blue Open‑Heart brings a bold, modern elegance to the open‑heart design. The deep royal‑blue dial paired with a polished stainless‑steel case creates a crisp, refined contrast that feels premium, confident, and unmistakably APEX. The open‑heart window reveals the beating NH38 movement beneath, adding mechanical character and a sense of depth that elevates the entire dial.

With a 41mm case size and a slim 12mm thickness, the Royal Blue Open‑Heart wears comfortably on any wrist. Bright C3 lume ensures excellent 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 Royal Blue Open‑Heart feels solid, reliable, and ready for anything.

---

Key Features

• 41mm case size — bold, modern proportions with strong 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
• Royal‑blue dial with stainless‑steel case — bold, modern, and visually striking
• 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 finish — durable, refined, and built to last

---

Who It’s For

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

• Bold, modern, and refined
• Visually striking with mechanical character
• Comfortable for everyday wear
• Highly legible in all conditions
• A confident, versatile piece with a premium blue identity