Description
The SEIKO SPB307J1 Presage Sharp Edged "Kurotobi" Automatic watch is an automatic timepiece with a power reserve indicator, day and date display, and a rich, textured russet-brown dial.
Movement
- Caliber Number: 6R21.
- Type: Automatic with manual winding capability.
- Power Reserve: Approximately 45 hours.
- Precision: +25 to -15 seconds per day.
- Jewels: 29.
- Functions: Includes date hand, day hand, power reserve indicator, and stop seconds hand.
Case and strap
- Case Material: Stainless steel with a super-hard coating.
- Case Dimensions: Diameter is 40.2mm, thickness is 12.2mm, lug-to-lug is 47.4mm, and the distance between lugs is 20mm.
- Crystal: Sapphire crystal with anti-reflective coating.
- Clasp: Three-fold with push-button release.
- Strap Material: Stainless steel.
- Case Back: See-through screw case back.
Other details
- Water Resistance: 10 bar (100 meters / 330 feet).
- LumiBrite: On hands and indices.
- Weight: 166.0g.
- Dial Color: Dark brown with a Japanese "asanoha" pattern.
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