The Titanium Field Guide

Zelos Spearfish Titanium

The Zelos Spearfish Titanium is a current-production diver watch with a Titanium (hardened ~1200 HV) case, finished with surface hardened ~1200 hv. It measures 40.0 mm across, 10 mm thick, and is water resistant to 200 m. Inside is the Sellita SW300 + TT651 module automatic (grande date / gmt options) movement, with ~68 h power reserve. Complications: Date, GMT. Priced from $899 (approx, varies (Grande Date / GMT)). Brand origin: Singapore.

Titanium diver watchesUnder $1,000Under 11 mm thickGMT
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Reference–
TypeDiver
Price$899 · approx, varies (Grande Date / GMT)
Case diameter40.0 mm
Thickness10 mm
Lug-to-lug–
Water resistance200 m
Weight–
OriginSingapore
MovementAutomatic (Grande Date / GMT options)
CaliberSellita SW300 + TT651 module
Power reserve~68 h
ComplicationsDate, GMT
TitaniumTitanium (hardened ~1200 HV)
Surface treatmentSurface hardened ~1200 HV
Nickel-freeYes
Bracelet / strapTitanium
CrystalSapphire, AR coated
Display backNo
DialMultiple
LumeSuper-LumiNova
AvailabilityOffered
StatusCurrent
High confidence Verified 2026-06-18 Source: Fratello Maker / listing ↗
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