The Seiko Prospex Automatic Sumo SPB321J1 features a striking blue dial housed in a rugged 45mm stainless steel case. It’s powered by automatic movement and includes a date function at 3 o'clock. With water resistance up to 200 meters, it's perfect for diving. The watch also boasts a scratch-resistant sapphire crystal, a stainless steel bracelet, and a unidirectional bezel, blending durability with a sporty aesthetic.
Movement
Caliber Number
- 6R35
- Movement Type
- Automatic with manual winding
- Accuracy
- +25 to -15 seconds per day
- Duration
- Approx. 70 hours
- Jewels
- 24
- Functions
- Stop seconds hand function
- Date display
Case/Band
Case Material
- Stainless steel (super hard coating)
- Case Size
- Thickness:13.4mm
Diameter:45.0mm
Lug-to-lug:52.6mm - Crystal
- Sapphire crystal
- Crystal Coating
- Anti-reflective coating on inner surface
- LumiBrite
- LumiBrite on hands, index(es) and bezel
- Clasp
- Three-fold clasp with secure lock , push button release with extender
- Lug width
- 20
Other Details
Water Resistance
- 200m / 660ft diver's
- Weight
- 190.0
- Features
- Unidirectional rotating bezel
- Screw-down crown
- Three-fold clasp with secure lock
- Screw case back
