King Seiko KSK
Ref. SJE105
- Case diameter
- 38.6 mm
- Manufacturer spec
- Lug-to-lug
- 45.8 mm
- Manufacturer spec
- Thickness
- 10.7 mm
- Manufacturer spec
- Lug width
- 19 mm
- Manufacturer spec
Retail price $3,300 (US, Oct 2026)
How the King Seiko KSK wears
Its lugs add 7.2 mm to the 38.6 mm case, close to the 7.1 mm typical across the almanac, so its diameter is a fair guide to how it wears.
On our fit model it sits best on wrists from 6.5" to 7.75" (16.5–19.7 cm); below 6.5" the lugs start to reach the edge of the wrist.
At 10.7 mm thick it is slimmer than 52% of the 56 other dress watches we've measured, so it slides under a cuff more easily than most.
Its 19 mm lug width is one of the most common strap sizes; 21 other watches here share it, so aftermarket straps are easy to find.
Will the King Seiko KSK fit your wrist?
With a 45.8 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.
| Wrist | Flat width (est.) | Fit |
|---|---|---|
| 6" | 47.2 mm | Snug, lugs near the edge |
| 6.5" | 51.2 mm | Ideal fit |
| 7" | 55.1 mm | Ideal fit |
| 7.5" | 59.1 mm | Ideal fit |
| 8" | 63 mm | Wears small |
Specifications
- Reference
- SJE105
- Collection
- King Seiko
- Status
- In production
- Case material
- stainless steel
- Crystal
- box-shaped sapphire
- Water resistance
- 50 m
- Bezel
- polished steel
- Dial
- blue (textured)
- Strap / bracelet
- stainless steel bracelet, deployment clasp
- Weight
- 130 g
- Style
- Dress, Everyday
Movement
- Caliber
- Seiko 6L35
- Type
- automatic
- Power reserve
- 45 hours
- Jewels
- 26
- Accuracy
- +15/-10 s/day
Takes 19 mm straps. See other 19 mm watches and straps.
More King Seiko references
Watches that wear the same size
Other watches within 1.5 mm of its lug-to-lug.
- Dan Henry1970 Automatic Diver 40mmDH70-40M-O12
- Case
- 40 mm
- Lug-to-lug
- 45.7 mm
- Thick
- 14.8 mm
- Grand SeikoSport 9F GMTSBGN027
- Case
- 39 mm
- Lug-to-lug
- 45.9 mm
- Thick
- 12.3 mm
- SeikoProspex Speedtimer Solar ChronographSSC911
- Case
- 41.4 mm
- Lug-to-lug
- 45.9 mm
- Thick
- 13 mm
- Jaeger-LeCoultreReverso Tribute Monoface Small SecondsQ397848J
- Case
- 27.4 mm
- Lug-to-lug
- 45.6 mm
- Thick
- 8.5 mm
- BalticHermetique Tourer
- Case
- 37 mm
- Lug-to-lug
- 46 mm
- Thick
- 10.8 mm
- LorierHyperion GMTHYP3-BLK-DT-BRAC
- Case
- 39 mm
- Lug-to-lug
- 46 mm
- Thick
- 12.2 mm
Same 19 mm lug width
All 19 mm watchesThese take the same straps as the King Seiko KSK.
- BulovaOceanographer Devil Diver 41mm96B350 · “Devil Diver”
- Case
- 41 mm
- Lug-to-lug
- —
- Thick
- 14.5 mm
- Grand SeikoElegance GMTSBGM221
- Case
- 39.5 mm
- Lug-to-lug
- 46.9 mm
- Thick
- 13.7 mm
- Grand SeikoElegance Spring DriveSBGA407 · “Skyflake”
- Case
- 40.2 mm
- Lug-to-lug
- 48.5 mm
- Thick
- 12.8 mm
- Grand SeikoGrand Seiko Elegance Manual-WindSBGW231
- Case
- 37.3 mm
- Lug-to-lug
- 44.3 mm
- Thick
- 11.6 mm
- Grand SeikoHeritage 9F Quartz 37mmSBGX261
- Case
- 37 mm
- Lug-to-lug
- 44.6 mm
- Thick
- 10 mm
- LonginesConquest 38mmL3.720.4.92.6
- Case
- 38 mm
- Lug-to-lug
- 46.8 mm
- Thick
- 10.9 mm