Seiko Prospex Speedtimer SPB517J1 – Datsun 240Z Limited Edition

Celebrating a legendary motorsport heritage, the Seiko Prospex Speedtimer SPB517J1 pays tribute to the iconic Datsun 240Z with bold racing-inspired design cues and meticulous mechanical performance. This limited-edition timepiece features a robust stainless steel case with super-hard coating, a striking black dial with red accents, and an internal countdown bezel for precision timing. Powered by Seiko’s automatic Caliber 6R55 movement with an approximate 72-hour power reserve, the SPB517J1 balances classic style with everyday performance and collector appeal — limited to just 2,500 pieces worldwide.

Specifications
Model: SPB517 / SPB517J1
Collection: Seiko Prospex Speedtimer (Datsun 240Z Limited Edition)
Movement: Automatic with manual winding — Caliber 6R55 (approx. 72-hour power reserve)
Accuracy: +25 to −15 seconds per day
Jewels: 24
Case Material: Stainless steel with super-hard coating
Case Size: 39.5 mm diameter × 12.0 mm thickness
Lug-to-Lug: 44.5 mm
Crystal: Curved sapphire crystal with anti-reflective coating
Dial: Black dial with red accents and internal countdown bezel
Band Material: Cow leather strap with three-fold clasp and push-button release
Water Resistance: 20 bar / 200 m
Magnetic Resistance: 4,800 A/m
Weight: Approx. 86 g
Special Features:
- Limited edition (2,500 pieces) with serial number engraved on caseback
- Internal rotating countdown bezel for event timing
- Screw caseback