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| Seiko has announced four new Prospex Speedtimer watches |
Seiko has just dropped a significant update to its Prospex Speedtimer collection, adding four brand-new mechanical references that blend motorsport heritage with modern watchmaking. The announcement comes hot on the heels of the Asia-Pacific-exclusive Prospex HBB003K1 and HBB004K1, as well as the Prospex 1965 Heritage Diver, which were revealed only days ago. Now, the Japanese giant is turning its attention back to the track-inspired Speedtimer family with two automatic chronographs and two time-and-date models: the HBD001, HBD002, HBC003, and HBC004.
All four watches are regular production pieces — not limited editions — and will hit retailers globally starting September 2026. While they share the Speedtimer name and a clear stylistic connection to Seiko’s early-1970s chronographs, each pair carves out its own niche in terms of size, movement, and aesthetic.
Below, we break down everything you need to know about Seiko’s latest Prospex Speedtimer mechanical lineup.
The Automatic Chronographs: Seiko Prospex HBD001 & HBD002
The first two models in the new quartet are the Prospex HBD001 and HBD002, both powered by Seiko’s respected automatic caliber 8R48. This movement is a step up from the brand’s more common 8R46 chronograph, featuring a column wheel and vertical clutch for precise, snappy pusher action. It operates at 28,800 vibrations per hour (4 Hz) and offers a solid 45-hour power reserve.
From a design perspective, these watches follow the same general architecture as the SRQ047 and SRQ049 introduced back in 2023. That means a 42 mm stainless-steel case with Seiko’s proprietary super-hard coating, a thickness of 14.6 mm, and a sapphire crystal up front. Water resistance is rated at 100 metres, making them practical for daily wear but not dive-ready.
Where the two SKUs diverge is in their dial and strap combinations. The Seiko Prospex HBD001 features a vertically textured sky-blue dial with contrasting black chronograph counters. It comes mounted on a stainless-steel bracelet, giving it a sporty, all-metal look that echoes the classic “Panda” or “reverse Panda” Speedtimer aesthetics but with a refreshing blue twist. Meanwhile, the Seiko Prospex HBD002 opts for a warmer, more understated silver dial with sky-blue subdials, paired with a grey leather strap. The leather adds a slightly dressier, more versatile character, even if the oversized pushers and tachymeter bezel keep it firmly in motorsport territory.
Both chronographs use the familiar Speedtimer layout with a tachymeter scale printed on the inner flange, three recessed subdials at 3, 6, and 9 o’clock, and a date window tucked neatly at 4:30. Lume is generous on the hands and applied indices, as expected from a Prospex model.
The Three-Hand Models: Seiko Prospex HBC003 & HBC004
For those who appreciate the Speedtimer look but don’t need a chronograph complication, Seiko has introduced the Prospex HBC003 and HBC004. These are three-hand, time-and-date watches that retain the motorsport-inspired styling but come in a considerably smaller and thinner package. The stainless-steel case measures 39.5 mm across and just 12 mm thick — a notable reduction from the 42 mm chronographs — and water resistance actually increases to 200 metres, making them more robust for outdoor activities.
Both models feature a sapphire crystal and an internal rotating bezel, a design cue that adds functionality without adding bulk. The internal bezel can be used for timing dives, pit stops, or simply for tracking elapsed minutes, and it reinforces the tool-watch feel of the Speedtimer line.
The Seiko Prospex HBC003 sports a light-blue vertically brushed dial with vibrant orange accents on the minute track, the seconds hand tip, and the internal bezel markings. It is paired with a steel bracelet, which ties it visually to the HBD001. In contrast, the Seiko Prospex HBC004 goes darker with a deep grey dial, similar orange detailing, and an embossed leather strap for a more rugged, vintage-inspired look. The orange accents give both watches a distinctly 1970s racing chronograph vibe, reminiscent of classic Seiko “UFO” or “Helmet” references.
Powering the HBC003 and HBC004 is Seiko’s 6R55 automatic caliber. This movement runs at a lower frequency of 21,600 vibrations per hour (3 Hz), but compensates with an impressive 72-hour power reserve — nearly three full days of autonomy. For everyday wearers, that extra reserve is a practical advantage, especially if you rotate between multiple watches.
Pricing and Availability
Seiko has positioned the new Speedtimer mechanicals across a fairly wide price range, reflecting the differences in movement and case construction.
- Seiko Prospex HBD001 — €2,780 (approx. $3,224)
- Seiko Prospex HBD002 — €2,680 (approx. $3,108)
- Seiko Prospex HBC003 — €1,030 (approx. $1,194)
- Seiko Prospex HBC004 — €1,000 (approx. $1,159)
All four models are regular production and will be available from authorised Seiko dealers and the brand’s online boutique starting September 2026. Given the current exchange rates, expect slight regional variations in pricing, but these figures should hold as a reliable guide for most markets.
For a more in-depth, hands-on perspective, Monochrome Watches has published a detailed review covering the entire collection, including live photos and on-wrist impressions.
Final Thoughts
Seiko’s decision to expand the Prospex Speedtimer range with four new mechanical models makes a lot of sense. The collection has been a quiet success since its modern reintroduction, offering accessible motorsport styling without the premium price of Grand Seiko or high-end Swiss chronographs. By splitting the lineup into two distinct categories — full chronographs and simpler three-hand watches — Seiko is catering to a broader audience while still keeping the Speedtimer identity intact.
The 42 mm HBD001 and HBD002 will appeal to enthusiasts who want a serious, column-wheel automatic chronograph with real heritage cues. The 39.5 mm HBC003 and HBC004, on the other hand, offer a more compact and affordable entry point, with better water resistance and a longer power reserve. If you’ve been waiting for a modern Speedtimer that fits smaller wrists or one that doesn’t require a chronograph complication, this new quartet delivers exactly that.
We’ll be keeping an eye out for these pieces when they land in stores this September. Until then, the specs and press images look very promising indeed.
