Seiko Prospex x Automatic ft. Mechanical Speedtimer Men Formal Round 200m Water Resistant Watch HBC004J1 HBC004 HBC-004 HBC-004J1
Seiko Prospex Heritage Motoring Countdown Speedtimer HBC004 captures the spirit of 1970s neo‑classic young‑timer motoring. Its rich petrol blue dial, inspired by vintage car culture, is paired with an LWG‑certified sustainable leather strap embossed with patterns drawn from classic automotive interiors. Housed in a compact 39.5mm stainless steel case with a curved sapphire crystal, this timepiece evokes the romance of the open road with every glance.
Caliber Number / Movement
6R55 (automatic with manual winding capacity)
Power Reserve / Accuracy
Approximately 72 hours (+25 to -15 seconds per day)
Case / Band Material
Stainless steel (super hard coating) case with leather (calfskin) band (three-fold clasp with push-button release)
Water Resistance
200m / 20 bar
Case Size
Thickness: 12.0 mm
Diameter: 39.5 mm
Length: 44.5 mm
Lug width: 20.0 mm
Other Specifications
Seiko Prospex x Automatic ft. Mechanical Speedtimer
Made in Japan
Magnetic resistance (4,800 A/m)
Rotating countdown inner ring
Screw case back
24 jewels
Date display
Stop second hand function (hacking mechanism)
Regular timekeeping (analog display)
Disclaimer - Images are for illustration purposes only. Actual product size and colour may vary.
