![](https://www.seikowatches.com/no-en/-/media/Images/GlobalEn/Seiko/Home/products/kingseiko/SPB457_59_61/SPB461J1_9x16.jpg)
KSK Caliber 6R51 Model
![](https://www.seikowatches.com/no-en/-/media/Images/GlobalEn/Seiko/Home/products/kingseiko/SPB457_59_61/SPB461J1.png?mh=630&mw=1120&hash=D78B60739BFC2D737A74A8091107B1EC)
The "KSK" series, which has been in existence since the collection’s revival in 2022, is now available in a simple three-hand design with a 36.1mm case, the smallest of the current King Seiko models. The case has mirror polishing and hairline finishing to create a compact yet sharp design with prominent ridges, a characteristic of the "KSK" series.
![](https://www.seikowatches.com/no-en/-/media/Images/GlobalEn/Seiko/Home/products/kingseiko/SPB457_59_61/SPB461J1_01.png?mh=630&mw=1120&hash=B574BB5315D9175B114E24C491541449)
Ivy style originated on the East Coast of the United States in the 1950s and developed uniquely in Japan in the 1960s, when King Seiko was born. The dial is burgundy, a color favored for the rugby shirts and swing tops that accentuate the Ivy look in a unique way. The gold seconds hand adds a traditional accent, while the hour hand, minute hand, and indexes feature Lumibrite with a patinated appearance that harmonizes with the dial.
![](https://www.seikowatches.com/no-en/-/media/Images/GlobalEn/Seiko/Home/products/kingseiko/SPB457_59_61/SPB457J1_02.png?mh=630&mw=1120&hash=9DDC77F2028A0A5F6F227D8D0DEE3557)
The metal bracelet features a simple double-lever system, allowing it to be easily attached and removed without the use of tools. Combining the bracelet with leather straps (sold separately) greatly expands the range of coordination.
Running on the mechanical Caliber 6R51, the watch has a power reserve of three days. Fully wound, the watch can be removed on a Friday and worn the following Monday without any need for winding.
Specifications
Movement
- Caliber Number
- 6R51
- Movement Type
- Automatic with manual winding
- Precision
- +25 to -15 seconds per day
- Power reserve
- Approx. 72 hours(3 days)
- Jewels
- 24
- Functions
-
- Stop second hand function
Case/Band
- Case Material
- Stainless steel
- Case Size
-
Thickness:11.6mm
Diameter:36.1mm
Lug-to-lug:43.0mm - Crystal
- Box shaped sapphire crystal
- Crystal Coating
- Anti-reflective coating on inner surface
- LumiBrite
- Lumibrite on hands and index(es)
- Clasp
- Deployment clasp with push button release
- Bracelet Length
- 200.0mm
- Distance between lugs
- 19mm
Other Details
- Water Resistance
- 10 bar
- Weight
- 129.0g
- Features
-
- Interchangeable band with quick release spring bars
- Screw case back