Seiko’s legacy of chronograph expertise inspires a new Speedtimer

The charcoal-gray dialed Speedtimer is inspired from Seiko’s and Japan’s first chronograph wristwatch, the Crown Chronograph from 1964. The 1964 Crown Chronograph was designed from scratch and it marked the beginning of Seiko’s chronograph wristwatch manufacturing. It had a simple one-push mechanism but it amply demonstrated the same commitment to precision as would Caliber 6139 and all its successors with the inclusion of a column wheel to control the start, stop and reset functions.

The new Speedtimer incorporates a new movement from Seiko’s most advanced chronograph 8R series, Caliber 8R46.

Specifications

Movement

• Caliber Number: 8R46
• Movement Type: Automatic with manual winding
• Accuracy: 25 to -15 seconds per day
• Duration: Approx. 45 hours

Exterior

• Case Material: Stainless steel (super hard coating)
• Crystal: Dual-curved sapphire crystal
• Crystal Coating: Anti-reflective coating on inner surface
• LumiBrite: LumiBrite on hands and indexes
• Clasp: Three-fold clasp with push button release

Other Details

• Water Resistance: 10 bar
• Case Size: 42.5 ㎜
• Thickness: 15.1 ㎜
• Length: 45.5 ㎜
• Weight: 194.0 g
• Bracelet Length: 203 ㎜

Other Specifications

• Screw case back
• See-through case back

Other Features

• 34 jewels
• Equipped with small seconds hand
• Stop second hand function