Seiko 5 Sports SSK059
Silver dial, 39.4 mm, 4R34 automatic.
- Japan: SBSC009
- 4R34
- 39.4 × 47.9 mm
- 100 m
- Hardlex
- $450
Specifications
- Movement
- Seiko 4R34, automatic with hand winding
- Accuracy
- +45 to -35 sec/day
- Case diameter
- 39.4 mm
- Lug-to-lug
- 47.9 mm
- Thickness
- 13.6 mm
- Lug width
- 20 mm
- Case
- Stainless steel
- Crystal
- Hardlex
- Water resistance
- 100 m
- Magnetic resistance
- 4,800 A/m
- Weight
- 147 g
- Band length (max)
- 205 mm
- Clasp
- Three-fold clasp with push button release
- Lume
- LumiBrite on hands and index(es)
- Dial
- Silver
- Features
- See-through & Screw case back, Three-fold clasp with secure lock
- Released
- 2026-01
- Series
- Seiko 5 Sports, Field series
Same case, other dials
Identical case, movement and dimensions; only the dial, bezel or finish differs.
Other watches on the 4R34
Questions
What is the Japanese version of the Seiko SSK059?
In Japan the SSK059 is sold as the SBSC009: the same 4R34 calibre, the same 39.4 mm case and 100 m water resistance. Only the reference differs by market.
What movement is in the Seiko SSK059?
The SSK059 runs on the Seiko 4R34, an automatic movement that can also be wound by hand. See the 4R34 page for its specs and every watch built on it.
Does the Seiko SSK059 have a sapphire crystal?
No. The SSK059 has a Hardlex crystal. Hardlex is Seiko's hardened mineral glass: tougher than plain mineral glass, softer than sapphire.
How water resistant is the Seiko SSK059?
100 m (10 bar). That covers swimming and snorkelling; it is not a certified diver's watch unless Seiko says so.
What is the lug width of the Seiko SSK059?
20 mm. Any 20 mm strap fits.