The Titanium Field Guide

Seiko Prospex Shogun Titanium (SPB191)

The Seiko Prospex Shogun Titanium (SPB191) is a current-production diver watch with a Titanium (grade undisclosed) case, finished with super-hard coating. It measures 43.5 mm across, 13.3 mm thick, and is water resistant to 200 m. Inside is the Seiko 6R35 automatic movement, with 70 h power reserve. Complications: Date. Priced from $1,200 (MSRP). Brand origin: Japan.

Titanium diver watchesUnder $3,000
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Reference–
TypeDiver
Price$1,200 · MSRP
Case diameter43.5 mm
Thickness13.3 mm
Lug-to-lug–
Water resistance200 m
Weight–
OriginJapan
MovementAutomatic
CaliberSeiko 6R35
Power reserve70 h
ComplicationsDate
TitaniumTitanium (grade undisclosed)
Surface treatmentSuper-hard coating
Nickel-freeYes
Bracelet / strapTitanium bracelet
CrystalSapphire, AR coated
Display backNo
DialWhite (SPB191); black (SPB189)
LumeLumiBrite
AvailabilityOffered
StatusCurrent
High confidence Verified 2026-06-19 Source: Monochrome Maker / listing ↗
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