• Discover the Seiko Astron SBXY101. The Nexter series in a compact and ultra-thin 36mm format. Titanium, Super Clear Sapphire, and radio synchronization. Absolute Japanese precision.

🌟 The New Era of Astron: Compact, Futuristic, and Precise

The Seiko Astron Nexter SBXY101 is not just a watch; it is the evolution of technical elegance. Belonging to the acclaimed Nexter series, this model redefines what a high-tech watch means by condensing atomic precision into a surprisingly compact and lightweight profile.

Forget bulky tech watches. With a diameter of 36mm and a thickness of just 8.7mm, this watch offers absolute comfort under your shirt cuff, combining the robustness of titanium with a mesmerizing geometric blue dial.

✨ Why choose the SBXY101?

• 📡 “Set & Forget” Accuracy: Thanks to its Solar Radio Wave caliber, the watch automatically connects to radio towers (Japan, China, USA, Germany, UK) to set the exact time. You'll never have to change the time or the battery.
• 🪶 “Featherweight” comfort: Made entirely of pure titanium with a Diamond Shield (DiaShield) coating, it is hypoallergenic, scratch-resistant, and so light that you will forget you are wearing it.
• 💎 Invisible clarity: Its sapphire crystal with Seiko's patented Super Clear Coating eliminates 99% of reflections. You'll feel like you can touch the hands directly.
• 📐 Compact Nexter Design: Unlike GPS Astrons (usually 43mm+), this 36mm model is perfect for slim wrists or those looking for a classic, understated style without sacrificing cutting-edge technology.

📊 Technical Specifications

Feature

Technical Detail

Brand/Model

Seiko Astron Nexter SBXY101 (JDM - Japan Domestic Market)

Movement

Solar Radio Wave Control (Caliber 7B62/7B72)

Accuracy

±15 sec/month (without signal) / Atomic accuracy (with signal)

Case Material

Pure Titanium with Diamond Shield Hardening

Diameter

36.0 mm (Mid-size / Dress Size)

Thickness

8.7 mm (Ultra-thin Profile)

Length (Lug-to-lug)

42.0 mm

Crystal

Sapphire with Super Clear coating

Dial

Grayish blue with crystal box pattern

Water Resistance

10 Bar / 100 Meters (Suitable for surface swimming)

Functions

Perpetual Calendar (until 2100), World Time, Energy Saving

Closure

Smart Adjuster with quick adjustment

Anti-magnetic

Yes (JIS Class 1)

🔍 In-Depth Analysis: Technology and Finishes

1. The Radio-Controlled Solar Caliber

Unlike its older siblings (the GPS line), the SBXY101 uses terrestrial radio waves. This allows for a drastic reduction in the size of the mechanism and energy consumption, achieving that 8.7mm profile that makes it so elegant. If you live in the northern hemisphere (Europe, USA, Japan), you will have the same accuracy as a GPS without the extra bulk.

2. The “Crystal Box” Dial

The dial is not flat; it has a subtle geometric texture inspired by crystallized quartz. Depending on how the light hits it, the color ranges from a technical blue to a deep gray, giving it a three-dimensional luxury feel.

3. Superior Ergonomics

Seiko has integrated a “Smart Adjuster” system into the clasp. This allows you to micro-adjust the bracelet on the fly (for example, if your wrist swells in the summer) without the need for tools.