The Titanium Field Guide

Casio Oceanus Manta OCW-S400

OCW-S400-1AJF

The Casio Oceanus Manta OCW-S400 is a current-production other watch with a Titanium (titanium carbide treatment) case, finished with titanium carbide treated titanium. It measures 41.3 mm across, 9.2 mm thick, and is water resistant to 100 m. Inside is the Casio 5728 tough solar, multi-band 6, bluetooth movement. Complications: Date. Priced from $760 (approx; maker page bot-blocked). Brand origin: Japan.

Titanium other watchesUnder $1,000Under 11 mm thickSolar
ReferenceOCW-S400-1AJF
TypeOther
Price$760 · approx; maker page bot-blocked
Case diameter41.3 mm
Thickness9.2 mm
Lug-to-lug–
Water resistance100 m
Weight–
OriginJapan
MovementTough Solar, Multi-Band 6, Bluetooth
CaliberCasio 5728
Power reserve–
ComplicationsDate
TitaniumTitanium (titanium carbide treatment)
Surface treatmentTitanium carbide treated titanium
Nickel-freeYes
Bracelet / strapTitanium
CrystalSapphire
Display backNo
DialBlack
LumeNeobrite
AvailabilityOffered
StatusCurrent; maker page bot-blocked
Medium confidence Verified 2026-06-23 Source: Casio Maker / listing ↗
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