Description
The Seiko Prospex SRPH99K1, known as the "Black Series Tortoise", is a limited edition automatic watch with a robust, land-oriented design.
Movement
- Caliber Number: 4R35
- Movement Type: Automatic with manual winding capacity
- Power Reserve: Approximately 41 hours
- Jewels: 23
- Frequency: 21,600 vibrations per hour (6 beats per second)
- Functions: 3 hands, date display, stop-seconds hand function
Case and Dimensions
- Case Material: Stainless steel with black hard coating (PVD)
- Case Shape: Round, "Tortoise" cushion-shaped profile
- Case Diameter: 42.4 mm
- Case Thickness: 11.7 mm
- Case Length (Lug-to-lug): 45.2 mm
- Water Resistance: 200 meters (20 ATM), suitable for swimming and diving
- Crown: Screw-down
- Case Back: Screw-down
Crystal and Dial
- Crystal Material: Sapphire crystal (scratch-resistant)
- Dial Color: Matte dark grey/black
- Luminescence: Green Lumibrite on hands and indices
- Bezel: Unidirectional (or bi-directional, sources vary) rotating black IP stainless steel bezel with a compass scale insert
Strap and Other Features
- Band Material: Black fabric/polyester strap
- Band Width: 20mm
- Closure: Buckle
- Limited Edition: Yes, 7,000 pieces worldwide
- Additional features: The case back is decorated with ground-to-air emergency signal codes.
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