
shipments around april 15th 2026
Discover the Seiko Prospex Speedtimer SBDC215 (SPB447) Automatic watch with calibre 6R55, 72-hour power reserve, slide rule and 200m WR. An icon of Japanese watchmaking. Buy it now!
Seiko Prospex Speedtimer SBDC215 / SPB447 Automatic Watch with Slide Rule
The Seiko Prospex Speedtimer SBDC215, also known by its international reference SPB447, revives the legendary legacy of Seiko's 1969 chronographs in a modern pilot's watch. This piece of Japanese watchmaking combines vintage design with the robustness of the Prospex collection and the precision of the advanced 6R55 automatic calibre, which offers an impressive 72-hour power reserve. Equipped with a slide rule bezel and a highly legible beige dial, this Speedtimer is the ultimate precision tool for adventurers and collectors.
Key Features of the Speedtimer SBDC215
High-Performance Automatic Caliber 6R55: Enjoy an exceptional power reserve of 3 days (72 hours), offering superior reliability for everyday and professional use.
Functional Slide Rule Bezel: A true analogue flight computer on your wrist, perfect for pilots and enthusiasts to perform complex calculations on the fly.
Robust Seiko Prospex Construction: Stainless steel case with Diamond Shield hardened treatment for superior scratch resistance and water resistance to 200 metres (20 ATM), suitable for recreational diving.
Maximum Readability: Curved sapphire crystal with internal anti-reflective treatment and Seiko's powerful LumiBrite on hands and indices, ensuring perfect readability in all light conditions.
Iconic Design: The beige dial and modest 39.5 mm dimensions make this a versatile, elegant and functional watch.
A Tool Watch for the Modern Adventurer
(H3) Precision and Autonomy: The Heart of the 6R55 Calibre
The 6R55 movement is not just an automatic calibre; it is a statement of intent from Seiko. Its long power reserve of 72 hours means you can take your watch off on Friday and put it back on on Monday without having to wind it or adjust the time. Its anti-magnetic reliability ensures accuracy even in demanding environments.
The Pilot's Tool on Your Wrist
Inspired by classic aviator watches, the Seiko SBDC215's bidirectional bezel with slide rule allows you to perform unit conversions, speed calculations, fuel consumption and much more. It's a nostalgic and practical feature that sets this Speedtimer apart from other sports watches.
Technical Specifications of the Seiko SBDC215
Brand: Seiko
Collection: Prospex
Model: SBDC215 (International Ref.: SPB447)
Movement: Automatic with manual winding capability
Caliber: 6R55
Power Reserve: Approx. 72 hours
Accuracy: +25 to -15 seconds per day
Case Material: Stainless steel with Diamond Shield coating
Case Diameter: 39.5 mm
Case Thickness: 12 mm
Crystal: Sapphire with anti-reflective coating
Dial: Analogue, beige
Luminescence: LumiBrite on hands and hour markers
Strap material: Stainless steel
Water resistance: 200 metres / 20 ATM (suitable for diving)
Additional features: Stop-second function, date, slide rule bezel, anti-magnetic.
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