Seiko Prospex Speedtimer SPB513 & SPB515: Classic Motorsport Timekeeping Returns

The Seiko Prospex Speedtimer collection has long been a favorite among motorsport enthusiasts, combining heritage design with modern precision. This September 2025, Seiko expands the lineup with two exciting new releases — the Seiko Prospex Speedtimer SPB513 and SPB515. These models pay homage to the Speedtimer legacy while introducing contemporary enhancements, including the robust Calibre 6R55 automatic movement and a vintage-inspired case design that appeals to both collectors and new enthusiasts.

First introduced in the late 1960s, the Seiko Speedtimer was a groundbreaking chronograph that cemented Seiko’s reputation in the world of precision timing. Used extensively in international sporting events, the Speedtimer became synonymous with performance and reliability. The new SPB513 and SPB515 proudly carry this heritage forward, offering a modern reinterpretation that balances timeless aesthetics with advanced watchmaking technology.

Design & Dimensions: Compact and Versatile

Both the SPB513 and SPB515 are housed in a 39.5 mm stainless steel case, offering a perfectly balanced size for contemporary wrists while maintaining vintage appeal. At just 12 mm thick, the case ensures a comfortable fit under a cuff without sacrificing durability.

The cases feature a super-hard coating to resist scratches and enhance longevity, while a curved sapphire crystal with anti-reflective coating guarantees optimal legibility in various lighting conditions.

Adding to their motorsport spirit, both models are equipped with an inner rotating countdown bezel, a functional nod to the brand’s timekeeping roots.

Whether you’re drawn to the sleek silver-white elegance of the SPB513 or the bold, sporty flair of the SPB515, both watches stand as testament to Seiko’s ongoing legacy in the world of precision timing.

Movement & Performance: The Calibre 6R55

At the heart of both models is the Calibre 6R55 automatic movement, a trusted Seiko engine known for its reliability and efficiency.

• Frequency: 21,600 vibrations per hour
  
• Power Reserve: 72 hours (3 full days)
  
• Magnetic Resistance: Up to 4,800 A/m for enhanced precision in modern environments

This movement ensures that the SPB513 and SPB515 not only look impressive but also deliver dependable daily performance.

Technical Specifications – Seiko Prospex Speedtimer SPB513 & SPB515

The Seiko Prospex Speedtimer SPB513 & SPB515 are part of Seiko’s permanent collection and will be available from September 2025 at Seiko boutiques and authorized retailers worldwide.

Price: Approximately €1,000 / USD 995 (region-dependent).

Conclusion

The Seiko Prospex Speedtimer SPB513 & SPB515 exemplify Seiko’s ability to merge heritage design with modern functionality. With their compact case, impressive 6R55 movement, and versatile styling, these models are destined to become favorites among collectors and enthusiasts who appreciate motorsport-inspired timepieces.