Casio Oceanus Manta OCW-S400

The Casio Oceanus Manta OCW-S400 is a current-production watch with a Titanium (titanium carbide treatment) case, finished with titanium carbide treated titanium. At 79 g it sits around the middle for watches in the guide, and is priced well under the $1,900 median across the guide.

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Price

$760

Titanium

Titanium (titanium carbide treatment)

Weight

79 g (with bracelet)

Water resistance

100 m

Reference

OCW-S400-1AJF

Type

Other

Case diameter

41.3 mm

Thickness

9.2 mm

Origin

Japan

Movement

Tough Solar, Multi-Band 6, Bluetooth

Caliber

Casio 5728

Complications

Date

Case shape

Round

Case colour

Natural / grey

Finish technology

Surface hardening

Surface treatment

Titanium carbide treated titanium

Caseback

Titanium

Nickel-free

Not verified (clasp or buckle material not confirmed)

Bracelet / strap

Titanium

Crystal

Sapphire

Display back

No

Dial

Black

Dial colours

Black

Lume

Neobrite

Availability

Offered

Status

Current

Not published

Lug-to-lug, Power reserve, Titanium bracelet Help verify

Medium confidence Verified Jun 2026 Source: Casio Maker / listing ↗

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