Seiko SPB447
Ref. SPB447 · In production
- Case40.2 mm
- Thick12.4 mm
- Lug-to-lug48 mm
- Water res.100 m
- MovementAutomatic
- CrystalSapphire
Overview
The Seiko SPB447 is a gmt watch from the Presage collection, part of the Classic Series family. It has a 40.2 mm stainless steel case, 12.4 mm thick, 48 mm from lug to lug. Inside is a automatic movement (calibre 6R54) with 72 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 16.2–18.0 cm (6.4–7.1 in), by our Watch Finder sizing guide
- Everyday wear including swimming
- Frequent travellers who track two time zones
- People who enjoy seeing a mechanical movement at work
Strengths
- Sapphire crystal resists scratches
- 72 h power reserve survives a weekend off the wrist
- Display caseback shows the movement
- Hacks and hand-winds, so it is easy to set
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 40.2 mm | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Thickness | 12.4 mm | seikowatches.com · 23 Oct 2026 |
| Lug-to-lug | 48 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 | 87 g | seikowatches.com · 23 Oct 2026 |
Dial
| Date | Date | our classification |
|---|---|---|
| GMT / second time zone | Yes | seikowatches.com · 23 Oct 2026 |
Movement
| Movement type | Automatic | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 6R54 | seikowatches.com · 23 Oct 2026 |
| Made in-house | Yes | seikowatches.com · 23 Oct 2026 |
| Power reserve | 72 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) | $1,750 | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Production status | In production | seikowatches.com · 23 Oct 2026 |
| Style (our classification) | GMT | 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 SPB447
How big is the Seiko SPB447?
The case is 40.2 mm wide, 12.4 mm thick and 48 mm from lug to lug.
What movement does the Seiko SPB447 use?
It uses the 6R54 calibre, a automatic movement with 72 h of power reserve.
Can I swim with the Seiko SPB447?
Yes. It is rated to 100 m.
Does the Seiko SPB447 have a date?
Yes, it shows the date.
How much is the Seiko SPB447?
The US list price was $1,750 on seikowatches.com when we checked on 23 Oct 2026. Prices change, so check before you buy.
Will the Seiko SPB447 fit my wrist?
By our sizing guide it sits best on wrists of about 16.2–18.0 cm (6.4–7.1 in). Use the fit checker on this page to test your own wrist.
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