OCEANUS Manta S400 OCW-S400RL — Retro Tone Collection
Domestic limited edition of 300 pieces / Released August 2026
Under the brand concept "Elegance, Technology," this OCEANUS model pursues refined finishing and rich functionality in a timeless classic style. The half-matte gradation dial blends color and light subtly from center to edge for a rich, nuanced expression. The bezel ring is crafted from sapphire glass with a laser-etched half-matte finish, giving it a frosted, glass-like luster that softly diffuses light across the bezel's color.
The genuine leather band is made from full vegetable-tanned cowhide by Tochigi Leather Co., a leather specialist founded in 1937 — a band that grows softer and develops a beautiful patina the more it is worn.
Specifications
Model
OCW-S400RL-8AJR
Series
OCEANUS Manta S400 Series / Retro Tone Collection (limited to 300 pieces in Japan)
Case size
46.5 × 41.3 × 9.2 mm / 1.83 × 1.63 × 0.36 in
Weight
38 g / 1.3 oz
Case / bezel material
Titanium / sapphire glass bezel ring
Band
Genuine leather band (cowhide, full vegetable tanning by Tochigi Leather)
Glass
Sapphire glass with double-sided anti-reflective coating (dual curve)
Water resistance
10-bar (100-meter)
Time correction
Multi-Band 6 (Japan, North America, Europe, China) + Bluetooth (auto time correction via smartphone)
Power source
Tough Solar
Mobile Link / App
CASIO WATCHES app — auto time correction, easy watch setting, Time & Place, watch status display, phone finder, Premium Production Line certificate
Surface treatment
Titanium carbide coating, rose gold IP bezel
Functions
Full auto calendar, Hand position auto-correction, Power saving function
