SEIKO SPORTS SRPK91K1

The Seiko SRPK91K1is a stainless steel automatic watch from the Seiko 5 Sports SNXS series. 

Movement

• Caliber Number: 4R36
• Movement Type: Automatic with manual winding capability
• Power Reserve: Approximately 41 hours
• Jewels: 24
• Functions: Day/Date display, stop second hand function (hacking) 

• Case Material: Stainless steel
• Case Size:
  • Diameter: 37.4 mm
  • Thickness: 12.5 mm
  • Lug-to-lug: 44.7 mm
• Crystal: Curved Hardlex
• Band Material: Stainless steel bracelet
• Lug Width: 18 mm
• Clasp: Three-fold clasp with push button release
• Case Back: See-through and screw-down 

• Water Resistance: 10 bar (100 meters/330 feet)
• Dial Color: Ivory/Beige
• LumiBrite: On hands and indexes
• Weight: 125.0 g
• Magnetic Resistance: 4,800 A/m