The Speedtimer Prospex watch collection represents Seiko’s professional timekeeping heritage.

This particular design is inspired by two 1969 models – the world’s first automatic chronographs with a column wheel and vertical clutch. – but features new innovations, including high contrast dial and subdial colours for legibility and the 8R calibre.

Becoming official timekeeper for Tokyo’s high profile international sports event in 1964 was a turning point in Seiko’s history. Making precisely accurate professional timing instruments, with no prior experience, resulted in the Seiko Watch Corporation design code of visibility, legibility and functionality.

Prospex is a combination of the words ‘Professional’ and ‘Specifications.’ These timepieces are designed to be practical, reliable and durable within extreme or everyday environments, for experts, sports lovers and adventure seekers alike.

Movement
- Accuracy: -15/+25 seconds per day
- Calibre: 8R46
- Movement Type: Automatic & Manual Winding
- Power Reserve: 45 Hours

Watch Case
- Case Material: Stainless steel (Super Hard Coating)
- Case Thickness: 15.09mm
- Case Diameter: 42.5mm
- Case Length: 50.0mm
- Lug Width: 20.0mm

Exterior
- Dial Colour: Blue
- LumiBrite: Lumibrite on hands and indexes
- Clasp: Three-fold clasp with push button release
- Strap/Bracelet:
- Stainless Steel

Other Specifications
- Water Resistance: 10 bar
- Crystal Coating: Anti-reflective coating on inner surface
- Crystal Type: Dual-curved sapphire crystal