Seiko SJE107
Ref. SJE107 · In production
- Case38.6 mm
- Thick10.7 mm
- Lug-to-lug45.8 mm
- Water res.50 m
- MovementAutomatic
- CrystalSapphire
Overview
The Seiko SJE107 is a dress watch from the King Seiko collection, part of the KSK family. It has a 38.6 mm stainless steel case, 10.7 mm thick, 45.8 mm from lug to lug. Inside is a automatic movement (calibre 6L35) with 45 h of power reserve. You also get 50 m water resistance, a sapphire crystal and a bracelet.
Who it suits
- Wrists of roughly 15.4–17.3 cm (6.1–6.8 in), by our Watch Finder sizing guide
- Desk and dress wear (keep it away from swimming)
- Shirt cuffs and smarter dress codes
Strengths
- Sapphire crystal resists scratches
- Slim at 10.7 mm
- Compact 45.8 mm lug-to-lug suits smaller wrists
- Hacks and hand-winds, so it is easy to set
Trade-offs
- Only 50 m water resistance: splash-proof, not for swimming
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 38.6 mm | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Thickness | 10.7 mm | seikowatches.com · 23 Oct 2026 |
| Lug-to-lug | 45.8 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 | Screw | seikowatches.com · 23 Oct 2026 |
| Water resistance | 50 m | seikowatches.com · 23 Oct 2026 |
| Magnetic resistance | 4,800 A/m | seikowatches.com · 23 Oct 2026 |
| Weight | 130 g | seikowatches.com · 23 Oct 2026 |
Dial
| Date | Date | our classification |
|---|
Movement
| Movement type | Automatic | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Calibre | 6L35 | 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 | Bracelet | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Lug width | 19 mm | seikowatches.com · 23 Oct 2026 |
Other
| US list price (MSRP) | $3,300 | seikowatches.com · 23 Oct 2026 |
|---|---|---|
| Production status | In production | seikowatches.com · 23 Oct 2026 |
| Style (our classification) | Dress | 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.
Variants with the same specs
Same case, movement and bracelet or strap; typically a different dial or finish.
More in KSK
Similar alternatives
Picked with Watch Finder's style tags and sizing.
Questions about the Seiko SJE107
How big is the Seiko SJE107?
The case is 38.6 mm wide, 10.7 mm thick and 45.8 mm from lug to lug.
What movement does the Seiko SJE107 use?
It uses the 6L35 calibre, a automatic movement with 45 h of power reserve.
Can I swim with the Seiko SJE107?
Not really. It is rated to 50 m.
Does the Seiko SJE107 have a date?
Yes, it shows the date.
How much is the Seiko SJE107?
The US list price was $3,300 on seikowatches.com when we checked on 23 Oct 2026. Prices change, so check before you buy.
Will the Seiko SJE107 fit my wrist?
By our sizing guide it sits best on wrists of about 15.4–17.3 cm (6.1–6.8 in). Use the fit checker on this page to test your own wrist.
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