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Seiko Prospex Speedtimer HBJ005P1 Watch
The Seiko Prospex Speedtimer HBJ005P1 is a solar-powered men's chronograph commemorating Seiko's 145th anniversary. Its purple dial is inspired by Edo-murasaki, a shade associated with Japanese aesthetic tradition and Tokyo's cultural identity. Gold-coloured accents and a two-tone tachymeter bezel complete a design that combines this cultural inspiration with the sporting character of the Speedtimer collection.
The 41.4 mm stainless steel case is paired with a steel bracelet and curved sapphire crystal with an anti-reflective coating on the inner surface. Its V192 solar movement features a chronograph, power reserve indicator, 24-hour hand and date display. This model is part of a limited edition of 8,000 pieces.
Seiko 145th Anniversary Edo Purple Solar Chronograph
Why choose this watch?
The Seiko HBJ005P1 stands out through an unusual colour combination for a sports chronograph: its Edo-murasaki-inspired purple dial contrasts with the two-tone bezel and gold-coloured accents. This commemorative edition retains the Speedtimer identity while incorporating a Japanese cultural reference. The V192 solar movement powers the chronograph without relying on a replaceable conventional battery, while the sapphire crystal and steel case complete a configuration suited to everyday wear.
Technical specifications
Movement
- Calibre: Seiko V192.
- Movement type: solar-powered.
- Accuracy: ±15 seconds per month.
- Power reserve: approximately 6 months on a full charge.
- Functions: hours, minutes, seconds, chronograph, date and power reserve indicator.
- 24-hour counter: yes.
- Chronograph: measures up to 60 minutes in 1/5-second increments.
- Overcharge prevention: yes.
Dial and indications
- Dial colour: purple inspired by Edo-murasaki.
- Details: gold-coloured accents.
- Display: analogue with chronograph.
- Bezel: two-tone aluminium with tachymeter scale.
- Luminescence: LumiBrite on the hands and indexes.
Case and dimensions
- Reference: HBJ005P1.
- Brand: Seiko.
- Collection: Prospex Speedtimer.
- Edition: limited to 8,000 pieces.
- Case material: stainless steel.
- Shape: round.
- Diameter: 41.4 mm.
- Thickness: 13 mm.
- Length: 45.9 mm.
- Water resistance: 100 metres / 10 ATM.
- Magnetic resistance: 4,800 A/m.
- Case back: screw-down, with limited-edition identification.
Crystal and bracelet
- Crystal type: curved sapphire.
- Crystal treatment: anti-reflective coating on the inner surface.
- Bracelet material: stainless steel.
- Clasp: three-fold clasp with push button.
- Lug width: 21 mm.
- Weight: 168 g.
Frequently asked questions
What is the connection between the Seiko HBJ005P1 and the Edo period?
The dial is inspired by Edo-murasaki, a purple shade associated with Japanese aesthetic traditions from the Edo period and Tokyo's cultural heritage. Seiko revisits this colour reference to commemorate its 145th anniversary, bringing a historical inspiration together with the contemporary sports design of the Prospex collection.
What is the purpose of a chronograph's tachymeter bezel?
A tachymeter scale can be used to calculate average speed from the time taken to cover a known distance, usually one kilometre or one mile. Start the chronograph at the beginning of the distance and stop it at the end; the scale then indicates the corresponding average speed.
