Seiko Prospex Speedtimer SRQ057J1 – Datsun 240Z Limited Edition

A highly collectible tribute to motorsport heritage, the Seiko Prospex Speedtimer SRQ057 is a limited‑edition mechanical chronograph inspired by the legendary Datsun 240Z that dominated the East African Safari Rally in 1971. Powered by Seiko’s advanced Caliber 8R48 automatic movement with column‑wheel and vertical‑clutch chronograph construction, this 42 mm chronograph delivers smooth performance and precise elapsed‑time measurement up to 12 hours. Its bold black dial with red and blue accents, tachymeter bezel, and vintage‑inspired detailing bring racing spirit to every wear — all presented on a premium leather strap with a collector’s engraving on the caseback.

Specifications
Model: SRQ057 / SRQ057J1
Collection: Seiko Prospex Speedtimer “Datsun 240Z” Limited Edition
Movement: Automatic with manual winding — Caliber 8R48 (mechanical chronograph)
Power Reserve: Approx. 45 hours
Jewels: 34
Chronograph:
- Chronograph seconds
- 30‑minute and 12‑hour counters
Case Material: Stainless steel with super‑hard coating
Case Diameter: 42.0 mm
Case Thickness: 14.6 mm Lug‑to‑Lug: 49.5 mm
Crystal: Dual‑curved sapphire with anti‑reflective coating
Dial: Black with red & blue accents, Datsun logo and Speedtimer logo
Bezel: Black tachymeter bezel with red accents
Strap: Black leather strap with tri‑fold push‑button release clasp
Water Resistance: 10 bar / 100 m
Magnetic Resistance: 4,800 A/m
Caseback: Limited‑edition engraving with serial number
Limited Edition: “Datsun 240Z” styling; limited run of 500 pieces