SEIKO PROSPEX BLACK SERIES SPB257J1

The Seiko Prospex Black Series Limited Edition SPB257J1 is a modern reinterpretation of the iconic 1970 "Captain Willard" diver's watch, with updated specifications and a stealthy black and orange color scheme. 

Movement and accuracy

• Caliber: 6R35 automatic movement.
• Power reserve: Approximately 70 hours.
• Accuracy: +25 to -15 seconds per day.
• Jewels: 24.
• Functions: Date display and a hacking seconds function. 

 Exterior and features

• Case: 42.7mm diameter, 13.2mm thickness, and 46.6mm lug-to-lug, made of stainless steel with a black super-hard coating.
• Crystal: Curved sapphire crystal with an anti-reflective coating on the inner surface for improved legibility.
• Dial: A black dial with a textured, sandy ripple-like appearance and beige-colored LumiBrite on the hands and indices.
• Bezel: Unidirectional rotating bezel with black and orange markings, a throwback to the "Black Series" theme.
• Lume: Features Seiko's proprietary Lumibrite on the hands, indices, and bezel pip for high visibility in low-light conditions.
• Crown: Screw-down crown for enhanced water resistance.
• Water resistance: 200m / 660ft diver's watch.
• Straps: The watch comes with a brown fabric strap and an additional black silicone strap. 

 Other specifications

• Weight: 106 grams.
• Limited edition: 5,500 pieces produced worldwide.
• Caseback: A screw-down caseback with "LIMITED EDITION" and a serial number engraved.