Reference: OCW-S7000CN-1A (Made in Japan - Yamagata Premium Production)

This watch is the definition of Japanese elegance. Belonging to the premium Manta S7000 line (the finest and most elegant), this special edition is a collaboration with the master craftsmen of Naito Indigo Dyeing.

The design captures the concept of “Kuro-zome”: an indigo blue so deep it borders on black, evoking the natural oxidation of traditional dye.

• The Sapphire Bezel: It is not metal, but a ring of vapor-deposited sapphire crystal. It features a mesmerizing gradient from blue-green to dark purple, mimicking the changing hues of natural dye.
• The Textured Dial: The dial is not smooth; it has a pressed texture that replicates hand-dyed fabric, with a gradient from black to dark blue.
• Black DLC Body: The entire titanium case and bracelet have a deep black DLC (Diamond-Like Carbon) coating, completing the “Stealth Luxury” aesthetic.

This is a JDM (Japan Domestic Market) model, difficult to find outside of Japan and manufactured on Casio's famous premium production line in Yamagata.

TECHNICAL SPECIFICATIONS (Excellence in Materials)

• Brand: Casio Oceanus
• Collection: Manta (S7000 Series)
• Reference: OCW-S7000CN-1A
• Movement: Solar Quartz + Bluetooth + Multiband 6 (Module 5701)
• Origin: Made in Japan.

Case and Construction:

• Material: Solid Titanium with hardening treatment and Black DLC coating.
• Bezel: Sapphire Crystal with tachymeter and color graduation by vapor deposition.
• Dimensions: 47.5 × 42.8 mm.
• Thickness: 9.5 mm (Ultra-slim profile, a key feature of the Manta).
• Weight: 83 g (Extremely light, feels like you're wearing nothing).
• Crystal: Dual Curved Sapphire with anti-reflective treatment on both sides (invisible effect, 99% clarity).
• Finishes: Zaratsu polishing (katana sword polishing technique) for distortion-free mirror surfaces.
• Water resistance: 10 Bar (100 meters).

TECHNOLOGY AND FUNCTIONS

1. Tough Solar: Charges from any light source.
2. Hybrid Connectivity:
   • Bluetooth: Connects to your mobile phone to automatically adjust the world time (300 cities) and watch status.
   • Multiband 6: If you don't use your mobile phone, it receives radio signals from 6 towers around the world to maintain atomic accuracy.
3. Smart Access: Smart electronic crown for quick adjustments.
4. Functions:
   • Chronograph (1 second, 24 hours).
   • Day and Date (Fully automatic calendar).
   • Battery reserve indicator.
   • Automatic hand position correction.

⚠️ STYLE NOTE (The “Look & Feel”)

• The Color: In studio photos it looks very blue, but in real life it is much more subtle and elegant. It is a dark watch, where the purple and blue tones of the bezel appear to “dance” when light hits the sapphire. It is not garish, it is mysterious.
• Comfort: At only 9.5mm thick and 83 grams, it is probably the most comfortable chronograph available. It slips under any dress shirt without snagging.