Seiko - Speedtimer - SPB515J1 - Men - 2026

Seiko Prospex Speedtimer SPB515J1 – Automatic 3 Days

The Seiko Prospex Speedtimer SPB515J1 combines a distinctive 1970s-inspired design with modern mechanical performance.

Powered by the Seiko Calibre 6R55 automatic movement, it offers an impressive 72-hour power reserve. The 39.5 mm stainless-steel case features Seiko’s super-hard coating, complemented by a curved sapphire crystal with anti-reflective coating.

Its black dial is enhanced by subtle orange accents and an inner rotating countdown bezel, operated via the additional crown — a feature inspired by motorsport timing.

Key specifications:
• Reference: SPB515J1
• Calibre: 6R55 Automatic
• Power reserve: 72 hours / 3 days
• Case: 39.5 mm stainless steel
• Curved sapphire crystal
• Inner rotating countdown bezel
• Water resistance: 200 metres / 20 bar
• Stainless-steel bracelet

A sophisticated and versatile Speedtimer, combining Seiko’s sporting heritage, vintage-inspired design and modern reliability.