Seiko Prospex Speedtimer Automatik HBC004J1

Seiko Prospex HBC004J1 – Automatic 3-Hand with Motorsport Design and Leather Strap

The Seiko Prospex HBC004J1 combines the robust functionality of the Prospex collection with a design inspired by classic motorsport instruments. The compact 39.5-millimeter case, the automatic caliber 6R55, and the internal rotating bezel with countdown function make this model a versatile mechanical sports watch for everyday wear and leisure.

Motorsport-inspired Design

The design of the HBC004J1 is reminiscent of classic displays and instruments from motorsport. Clear structures, functional details, and the internal rotating bezel give the watch a technical and dynamic character.

Compact Case with 39.5 Millimeters

With a case diameter of 39.5 millimeters, the Prospex wears comfortably and balanced on the wrist. The compact size ensures a sporty presence without appearing oversized.

Automatic Movement Caliber 6R55

Inside, the proven Seiko Automatic Caliber 6R55 is at work. The mechanical movement offers a power reserve of up to 72 hours and can also be hand-wound if necessary.

Stop-seconds for Precise Setting

The Caliber 6R55 features a stop-seconds function. When the crown is pulled, the second hand stops, allowing the watch to be set with particular precision.

Accuracy of +25 / -15 Seconds per Day

The stated accuracy of the caliber is +25 to -15 seconds per day. This means the HBC004J1 offers reliable mechanical timekeeping for daily use.

Internal Rotating Bezel with Countdown Function

A special feature is the internal rotating bezel with countdown function. This allows time intervals to be tracked flexibly – for example, until the start of a race or for the duration of a pit stop.

Date Display for Everyday Use

In addition to hours, minutes, and seconds, the watch features a practical date display, adding an everyday function to the sporty equipment.

LumiBrite for Better Readability

A LumiBrite-coated triangular marker improves orientation in the dark and ensures that important elements remain clearly visible even in unfavorable lighting conditions.

Leather Strap for Sporty-Classic Character

The leather strap gives the HBC004J1 a slightly more classic character and forms a successful contrast to the technically oriented Prospex design.

Water Resistance up to 20 Bar

The Seiko Prospex HBC004J1 is water-resistant up to 20 bar or 200 meters, making it suitable for more demanding activities and sports use.

Technical Data

• Manufacturer: Seiko
• Collection: Prospex
• Reference: HBC004J1
• Target Group: Men
• Movement: Automatic
• Caliber: 6R55
• Power Reserve: Approx. 72 hours
• Accuracy: +25 / -15 seconds per day
• Manual Winding: Yes
• Stop-seconds Function: Yes
• Functions: Hour, Minute, Second, Date, Countdown
• Case Diameter: 39.5 mm
• Rotating Bezel: Internal
• Bezel Function: Countdown
• Luminous Material: LumiBrite
• Special Feature: Luminous Triangular Marker
• Strap: Leather
• Water Resistance: 20 Bar / 200 m
• Design: Motorsport-inspired

Sporty Prospex with 72 Hours Power Reserve and Countdown Function

The Seiko Prospex HBC004J1 combines a compact 39.5-millimeter case with the automatic caliber 6R55, 72 hours of power reserve, and a practical countdown rotating bezel. The leather strap also gives the motorsport-inspired model a sporty-classic character, making it a versatile choice for gentlemen who want to combine mechanical technology and functional design.