SEIKO 5 SPORTS SRPD51K1

The Seiko 5 Sports SRPD51K1 is a men's automatic watch with a blue dial, a stainless steel case, and a bracelet. It is powered by the Seiko 4R36 automatic movement and features a day/date display and a unidirectional rotating bezel. 

Specifications
Movement

• Caliber: 4R36, an in-house automatic movement with manual winding capability.
• Jewels: 24.
• Power Reserve: Approximately 41 hours.
• Frequency: 21,600 vibrations per hour.
• Hacking: The second hand can be stopped for precise time setting.
• Functions: Day and date display. 

• Material: Stainless steel.
• Diameter: 42.5mm.
• Thickness: 13.4mm.
• Lug-to-Lug: 46.0mm.
• Case Back: See-through and screw-down, with a transparent hardlex insert to view the movement.
• Bezel: Unidirectional rotating. 

• Dial Color: Blue.
• Crystal: Hardlex mineral crystal, which is Seiko's proprietary hardened mineral glass.
• Luminescence: LumiBrite on the hands and indexes. 

• Material: Stainless steel.
• Clasp: Three-fold clasp with a secure lock and push-button release.
• Lug Width: 22mm. 

• Water Resistance: 10 bar (100 meters), suitable for swimming.
• Magnetic Resistance: 4,800 A/m.
• Weight: 170.0g.