Seiko Prospex                                      Sea Watch SPB451
Seiko Prospex Sea Watch SPB451J1
Seiko Prospex Sea Watch SPB451J1

Seiko Prospex Sea Watch SPB451

SKU: SPB451
Regular price
£986.00 GBP
Regular price
Sale price
£986.00 GBP

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Seiko Prospex Sea Watch SPB451 · SPB451

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Product Description

The Seiko SPB451J1 offers a compact 40mm professional diver’s format with a curved sapphire crystal, strong LumiBrite visibility, and durable 300m construction. Powered by the 6R55 movement with a 72-hour reserve, it is crafted for reliability and everyday performance.

SKU SPB451
Case Material Stainless steel
Case Size Thickness: 13.0mm • Diameter: 40.0mm • Lug-to-lug: 46.4mm
Crystal Curved sapphire crystal
Crystal Coating Anti-reflective coating on inner surface
LumiBrite LumiBrite on hands, index(es) & bezel
Water Resistance 300m / 1000ft diver’s
Magnetic Resistance 4,800 A/m
Distance Between Lugs 20 mm
Weight 168 g
External Features Unidirectional rotating bezel
Screw-down crown
Three-fold clasp with secure lock
Push-button release with extender
Screw case back
Movement 6R55 — Automatic with manual winding
Power Reserve Approx. 72 hours (3 days)
Precision +25 to −15 seconds per day
Jewels 24
Functions Stop second hand function
Central hours, minutes, seconds
Date mechanism integrated in movement
Additional Notes 6R55 is Seiko’s latest long-reserve mid-range automatic movement designed for stability, improved torque, and reliable accuracy in daily use.

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