HBD001 Seiko Prospex Speedtimer Mechanical Chronograph 42mm - Blue on Bracelet

The Seiko Prospex Speedtimer HBD001 takes Seiko's 1972 Speedtimer design and builds it around an in-house automatic chronograph. The sky blue dial and sub-dials, each with its own finish, make the 30-minute and 12-hour registers easy to tell apart at a glance.

Why this watch stands out

The sub-dials are finished differently from one another, and that is what keeps a busy chronograph dial readable. The case carries vertical brushing, and a tachymeter scale handles speed readings.

What you're getting

• 42 mm stainless-steel case: Super hard coating, 14.6 mm thick and 49.5 mm lug to lug.
• Sky blue dial: LumiBrite hands and indexes, date window and tachymeter scale.
• Caliber 8R48 automatic chronograph: Hand-winds too, with 34 jewels and about 45 hours of power reserve.
• 30-minute and 12-hour registers: Plus a stop-second hand.
• Dual-curved sapphire crystal: Anti-reflective coating on the inside.
• 100 m water resistance: With a screw case back.
• Steel bracelet: Three-fold clasp with push-button release.

Know before you buy

Seiko builds the 8R48 in-house, and it resists magnetic fields up to 4,800 A/m, so everyday electronics will not throw off its timekeeping.