Seiko SRQ045
Ref. SRQ045 · In production
- Case42.5 mm
- Thick15.1 mm
- Lug-to-lug50 mm
- Water res.100 m
- MovementAutomatic
- CrystalSapphire
Overview
The Seiko SRQ045 is a chronograph watch from the Prospex collection, part of the SPEEDTIMER family. It has a 42.5 mm stainless steel case, 15.1 mm thick, 50 mm from lug to lug. Inside is a automatic movement (calibre 8R46) with 45 h of power reserve. You also get 100 m water resistance, a sapphire crystal and a cow leather strap.
Who it suits
- Wrists of roughly 17.0–18.9 cm (6.7–7.5 in), by our Watch Finder sizing guide
- Everyday wear including swimming
- People who enjoy seeing a mechanical movement at work
Strengths
- Sapphire crystal resists scratches
- Display caseback shows the movement
- Hacks and hand-winds, so it is easy to set
Trade-offs
- Thick at 15.1 mm: harder to slide under a cuff
- Long 50 mm lug-to-lug can overhang smaller wrists
- Limited edition: may be hard to find new
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 42.5 mm | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Thickness | 15.1 mm | seikowatches.com · 23 Oct 2026 |
| Lug-to-lug | 50 mm | seikowatches.com · 23 Oct 2026 |
| Case material | Stainless steel | seikowatches.com · 23 Oct 2026 |
| Crystal | Sapphire | seikowatches.com · 23 Oct 2026 |
| Anti-reflective coating | Anti-reflective coating on inner surface | seikowatches.com · 23 Oct 2026 |
| Caseback | Display (see-through) | seikowatches.com · 23 Oct 2026 |
| Water resistance | 100 m | seikowatches.com · 23 Oct 2026 |
| Magnetic resistance | 4,800 A/m | seikowatches.com · 23 Oct 2026 |
| Weight | 120 g | seikowatches.com · 23 Oct 2026 |
Dial
| Luminous material | LumiBrite | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Date | Date | our classification |
| Chronograph | Yes | our classification |
Movement
| Movement type | Automatic | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 8R46 | seikowatches.com · 23 Oct 2026 |
| Made in-house | Yes | seikowatches.com · 23 Oct 2026 |
| Power reserve | 45 h | seikowatches.com · 23 Oct 2026 |
| Hacking seconds | Yes | seikowatches.com · 23 Oct 2026 |
| Hand-winding | Yes | seikowatches.com · 23 Oct 2026 |
Strap / Bracelet
| Bracelet / strap | Cow leather | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Lug width | 20 mm | seikowatches.com · 23 Oct 2026 |
Other
| US list price (MSRP) | $3,000 | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Production status | In production | seikowatches.com · 23 Oct 2026 |
| Limited edition | Yes | seikowatches.com · 23 Oct 2026 |
| Style (our classification) | Chronograph | our classification |
Specs are summarised in our own words from the brand's product page. Each row links its source and the date we checked it. Fields we haven't verified are left out rather than guessed.
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Questions about the Seiko SRQ045
How big is the Seiko SRQ045?
The case is 42.5 mm wide, 15.1 mm thick and 50 mm from lug to lug.
What movement does the Seiko SRQ045 use?
It uses the 8R46 calibre, a automatic movement with 45 h of power reserve.
Can I swim with the Seiko SRQ045?
Yes. It is rated to 100 m.
Does the Seiko SRQ045 have a date?
Yes, it shows the date.
How much is the Seiko SRQ045?
The US list price was $3,000 on seikowatches.com when we checked on 23 Oct 2026. Prices change, so check before you buy.
Will the Seiko SRQ045 fit my wrist?
By our sizing guide it sits best on wrists of about 17.0–18.9 cm (6.7–7.5 in). Use the fit checker on this page to test your own wrist.
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