King Seiko SPB279J1 — short spec
Short overview, not a review. Pros and cons restate published facts only. No buying advice. Numbers not shown on a source we opened are omitted or marked unpublished.
Seiko’s King Seiko SPB279J1 is a 37.0 mm stainless-steel watch with a box-shaped sapphire crystal. Seiko’s France product page lists the case, calibre 6R31, and 10 bar water resistance.
Verified specs
| Item | Published | Source |
|---|---|---|
| Reference | SPB279J1 — King Seiko | Seiko product page (France) |
| Case diameter | 37.0 mm stainless steel | Seiko product page |
| Lug-to-lug | 43.6 mm | Seiko product page |
| Case thickness | 12.1 mm | Seiko product page |
| Lug width | 19 mm | Seiko product page |
| Crystal | Box-shaped sapphire; anti-reflective coating on inner surface | Seiko product page |
| Movement | Calibre 6R31; automatic with manual winding; −15 to +25 s/day; 24 jewels; stop seconds | Seiko product page |
| Power reserve | Approximately 70 hours | Seiko product page |
| Water resistance | 10 bar | Seiko product page |
| Weight | 129.0 g | Seiko product page |
| Clasp | Deployment clasp with push-button release | Seiko product page |
| EUR list | €1,800.00 | Seiko product page (France) |
| Singapore-dollar price | About S$2,588 (estimate). | €1 = S$1.4377, ExchangeRate-API open rates, 16 October 2026 |
| Seiko Singapore listing | Not listed on Seiko Singapore on 11 October 2026 | Seiko — King Seiko (Singapore) |
Fit on 6–7 in wrists (6.5 in reference)
Fit: Moderate risk on a 6.5 in wrist. The 43.6 mm lug-to-lug is Seiko’s figure. On 11 October 2026, SPB279J1 was not listed on Seiko Singapore.
The flat top of the wrist (usable span) is the width a watch can sit on without its lugs hanging over the edge.
| Wrist (approx.) | Seiko lug to lug | Thickness | Fit note |
|---|---|---|---|
| 6.0 in (152 mm) | 43.6 mm | 12.1 mm | Moderate risk: 43.6 mm is close to the flat top of a 6 in wrist (about 44.6 mm). |
| 6.5 in (165 mm) — reference | 43.6 mm | 12.1 mm | Moderate risk: 43.6 mm is just over 90% of the flat top of a 6.5 in wrist (48.35 mm before rounding). |
| 7.0 in (178 mm) | 43.6 mm | 12.1 mm | Low risk: 43.6 mm is under 90% of the flat top of a 7 in wrist (about 52.1 mm). |
Not published
SPB279J1among the King Seiko models on Seiko’s collection page on 11 October 2026.
Short overview
Pros (from published facts)
- 37.0 mm wide, 43.6 mm lug-to-lug, and 12.1 mm thick.
- Calibre 6R31 with about a 70-hour power reserve and 10 bar water resistance.
- Box-shaped sapphire with an anti-reflective coating on the inner surface, and a screw case back.
Cons / gaps (from published facts)
- The case is 12.1 mm thick.
Singapore note
The authorised dealers guide lists Seiko boutiques at JEM, Takashimaya, and VivoCity, and about 70 points of sale: Seiko salons at All Watches (Bugis), Watches of Switzerland CAPSULE (Jewel), Gassan and Time Emporium (Changi), and also Vincent Watch, Star Watches, City Chain, H2 Hub, Mustafa Centre, and more. Seiko France lists €1,800.00. About S$2,588 (estimate), converted at €1 = S$1.4377 (ExchangeRate-API open rates, 16 October 2026). The S$2,588 estimate doesn’t include 9% GST on imports. Watches are not subject to customs duty in the usual consumer path (see Buying in Singapore).
Sources
- Seiko — SPB279J1 product page (France)
- Seiko — King Seiko collection page
- Seiko — King Seiko (Singapore)
- Exchange rate: ExchangeRate-API open rates, 16 October 2026. €1 = S$1.4377.