SEIKO PROSPEX ALPINIST SPB117J1

The Seiko Prospex Alpinist SPB117J1 is an automatic watch known for its reliability and durability, featuring a stainless steel case and bracelet, black dial, and internal rotating compass bezel. It is an update to previous Alpinist models, featuring an upgraded movement with a longer power reserve and a sapphire crystal. 

Key specifications
 

• Movement: Caliber 6R35, an automatic movement with manual winding capacity.
• Power reserve: Approximately 70 hours.
• Accuracy: +25 to -15 seconds per day.
• Jewels: 24.
• Water resistance: 20 bar (200 meters).
• Case material: Stainless steel.
• Case dimensions:
  • Diameter: 39.5mm.
  • Thickness: 13.2mm.
  • Lug-to-lug length: 46.4mm.
• Crystal: Sapphire crystal with a magnifier over the date window.
• Crystal coating: Anti-reflective coating on the inner surface.
• Lume: Lumibrite on hands and indexes.
• Band: Stainless steel with a three-fold clasp with push-button release.
• Weight: 147.0g. 

• Rotating compass: The watch has an internal rotating compass ring, which can be operated using the crown at the 4 o'clock position.
• Case back: It features a transparent, screw-down case back.
• Crown: Equipped with a screw-down crown.
• Functions: Includes a date display and a stop seconds hand function.