SNK381K1

Seiko SNK381K1 Seiko 5 Men’s Automatic Watch

The SNK381K1 is a Seiko 5 automatic men’s watch with a black dial, luminous hands and index hour markers, day and date display at 3 o’clock, scratch-resistant Hardlex crystal, and a stainless-steel bracelet—built for reliable everyday wear.

• Case Size: 36–38 mm (market listings commonly show 37–38 mm)
• Case Thickness: ~11 mm
• Movement: Seiko Caliber 7S26 automatic; 21 jewels; approx. 40–41‑hour power reserve
• Crystal: Hardlex
• Band: Stainless steel bracelet; fold-over clasp with safety
• Display: Analog; 3 hands; day and date at 3 o’clock
• Caseback: Exhibition (transparent) case back
• Water Resistance: 30 meters