WHICH WATCH FITS

Seiko Prospex SPB451

Seiko · Prospex

Seiko Prospex SPB451

Seiko Prospex SPB451 (reference SPB451J1) — specifications, measurements, watch images and standardized wrist-fit previews for informed comparison.

A representative diver / sport model in the Prospex family.

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Best forDiver / Sport
Not ideal forSpecifications requiring final verification

At a glance

ReferenceSPB451J1
CollectionProspex
Model lineProspex
Production statusCurrent
Official size40 mm
Watch technology InfoMechanical
DisplayAnalog
Movement InfoAutomatic
Key features InfoDive bezel
Case diameter Info40 mm
Thickness Info13 mm
Lug-to-lug Info46.4 mm
Power reserve / runtime72 hours
Water resistance200 m
OriginJapan
Recommended wrist Info14–21 cm
Price categoryPremium

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Specifications last verified: 2026-08-06.

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