Watch Catalog

Casio Oceanus OCW-S400-2A

Blue, 46.5 × 41.3 mm, module 5728, solar.

  • Japan: OCW-S400-2AJF
  • Module 5728
  • 46.5 × 41.3 mm
  • 100 m
  • Sapphire crystal with glare-resistant coating (Dual curve)
  • $1,100

Specifications

Module
Casio module 5728, solar powered · how to set it
Power
Tough Solar (Solar powered)
Accuracy
±15 seconds per month (with no signal calibration and mobile link function)
Case size
46.5 × 41.3 mm (length × width)
Thickness
9.2 mm
Case
Titanium
Crystal
Sapphire crystal with glare-resistant coating (Dual curve)
Water resistance
100 m
Weight
79 g
Strap
Titanium Band
Colour
Blue
Features
Calendar, Date display, Energy saving feature, Hand home position correction feature, Run time, Time adjustment details
Released
2024-07
Series
Casio Oceanus

Same case, other colours

Identical case, module and dimensions; only the colours or materials differ.

Questions

What is the Japanese model number of the Casio OCW-S400-2A?

Casio's Japanese site names it the OCW-S400-2AJF: the same watch, its code with the Japanese market suffix.

What module is in the Casio OCW-S400-2A?

Module 5728, a solar powered movement. The module number is engraved on the caseback, and Casio's operation manual is filed under it: the module page links the manual and lists every watch that shares it.

Does the Casio OCW-S400-2A need a battery change?

No routine change: it is solar powered and recharges its cell from light. Casio's power spec: Tough Solar (Solar powered).

Does the Casio OCW-S400-2A have a sapphire crystal?

Yes, the OCW-S400-2A has a sapphire crystal.

How water resistant is the Casio OCW-S400-2A?

100 m (10 bar). That covers swimming and snorkelling; it is not a diver's watch.