Seiko Prospex Speedtimer | Black Dial Automatic 3-Day Watch – 39.5mm

SEIKO PROSPEX SPEEDTIMER HBC004

Motorsport Heritage. Mechanical Precision. Timeless Style.

Inspired by the golden era of classic motorsports, the Seiko Prospex Speedtimer HBC004 blends vintage racing character with contemporary Japanese watchmaking.

Featuring a sophisticated dark charcoal-black dial, subtle orange accents, and a richly textured black leather strap, this mechanical timepiece captures the spirit of classic performance automobiles.

At its heart is Seiko’s Caliber 6R55 automatic movement, offering an impressive 72-hour (3-day) power reserve for exceptional everyday versatility.

A distinctive inner rotating countdown timer, operated through the crown at 4 o’clock, allows you to measure time intervals with ease—whether inspired by the racetrack or everyday adventures.

Its perfectly balanced 39.5mm stainless steel case features a super-hard coating for enhanced durability, while the curved sapphire crystal provides superior scratch resistance and clarity.

Finished with a premium embossed leather strap reminiscent of classic automotive interiors, the HBC004 delivers understated sophistication with a sporty edge.

Technical Specifications

• Brand: Seiko
• Collection: Prospex Speedtimer
• Model: HBC004
• Movement: Automatic Caliber 6R55 with manual winding
• Power Reserve: Approximately 72 hours (3 days)
• Movement Accuracy: +25 to -15 seconds per day
• Jewels: 24
• Dial Color: Dark charcoal-black with orange accents
• Case Diameter: 39.5mm
• Case Thickness: 12.0mm
• Lug-to-Lug: 44.5mm
• Case Material: Stainless steel with super-hard coating
• Crystal: Curved sapphire crystal with inner anti-reflective coating
• Water Resistance: 200 meters / 20 bar
• Strap: Black embossed cow leather
• Clasp: Three-fold clasp with push-button release
• Lug Width: 20mm
• Luminescence: LumiBrite on hands and hour markers
• Magnetic Resistance: 4,800 A/m
• Special Feature: Inner rotating countdown timer
• Additional Features: Stop-seconds function and screw-down case back

Designed for Those Who Appreciate the Details

From the vintage-inspired dial to its beautifully textured leather strap, every element of the Seiko Prospex Speedtimer HBC004 reflects a commitment to craftsmanship, functionality, and timeless design.

Discover exceptional Japanese watchmaking at Rojo’s Collection.