Casio Oceanus Manta OCW-S400

The Casio Oceanus Manta OCW-S400 is a current-production other watch with a grey titanium (titanium carbide treatment) case, finished with titanium carbide treated titanium. It measures 41.3 mm across, 9.2 mm thick, 79 g, 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). Brand origin: Japan.

2 official photos · reader photos welcome

Reference

OCW-S400-1AJF

Type

Other

Price

$760 · approx

Case diameter

41.3 mm

Thickness

9.2 mm

Lug-to-lug

–

Water resistance

100 m

Weight

79 g (with bracelet)

Origin

Japan

Movement

Tough Solar, Multi-Band 6, Bluetooth

Caliber

Casio 5728

Power reserve

–

Complications

Date

Material

Titanium

Grade / type

Titanium (titanium carbide treatment)

Colour

Grey

Hardness

–

Construction

–

Surface treatment

Titanium carbide treated titanium

Caseback

Titanium

Nickel-free

Not verified (clasp or buckle material not confirmed)

Bracelet / strap

Titanium

Matching bracelet

–

Crystal

Sapphire

Display back

No

Dial

Black

Lume

Neobrite

Availability

Offered

Status

Current

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

Copy citationFacts are free to cite with a link.

Similar titanium and ceramic watches

NamicaOkami Neo Tokyo Kanji$70039.0 mm10.7 mm thickOthersame category · same style · similar price · similar thickness

Echo/NeutraAverau 42 Ceramic 3H$1,05042.0 mm10.5 mm thickOthersame category · same style · similar price · similar sizeSwiss Watch CompanyHyper-G$59540.5 mm10.8 mm thick56 gOthersame category · same style · similar price · similar sizeCIGA DesignHunter Titanium Automatic$59941.5 mmOthersame category · same style · similar price · similar size

CitizenAttesa ACT Line (CB3040 / CB3045, Super Titanium)$63839.0 mm9.7 mm thick93 gOthersame category · similar price · similar thickness · same movement

CitizenAttesa Tsuki-Yomi A-T (Super Titanium)$87543.0 mm105 gOthersame category · similar price · similar size · same movement

Michel HerbelinNewport Ceramique$2,15043.0 mm9.05 mm thickOthersame category · same style · similar size · similar thicknessBottaTRES 24 Automatic (Tri-Titanium)$2,28040.0 mm9.5 mm thickOthersame category · same style · similar size · similar thickness

Alternatives to the Casio Oceanus Manta OCW-S400

Verox Windup Century 38 Titanium$74438.0 mmOthersame category · same style · shared complications · similar priceSpinnakerHull Titanium Bronze Automatic Lapidary LE$42542.0 mmOthersame category · same style · shared complications · similar price

CertinaDS Action 40mm Titanium$51540.0 mmOthersame category · same style · shared complications · similar price

CertinaDS-7 Quartz Titanium$54539.0 mmOthersame category · same style · shared complications · similar price

TACSAVL III Titanium$60046.5 mm16 mm thickOthersame category · same style · similar price

InvictaTi-22 47512$69544.5 mmOthersame category · same style · similar price

More titanium and ceramic watches from Casio

CasioG-Shock Full Metal GMW-B5000TB-1$1,55043.2 mm13 mm thick110 gOther

CasioMR-G MRG-B2000 Kurogane-iro–49.8 mm16.9 mm thickOtherCasioG-Shock Full Metal GMW-B5000TCM-1$1,70043.2 mm13 mm thick110 gOtherCasioG-Shock Titanium Virtual Armor GMW-B5000TVA-1$1,65043.2 mm13 mm thick106 gOtherCasioG-Shock Titanium Virtual Armor GMW-B5000TVB-1$1,65043.2 mm13 mm thick106 gOtherCasioG-Shock GMW-B5000TR-9 (TranTixxii titanium)$1,70043.2 mm13 mm thick110 gOther

All titanium and ceramic Casio watches · Titanium and ceramic other watches · All 1040 watches

Learn: Titanium vs Ceramic · Ceramized Titanium