SEIKO PROSPEX BLACK SERIES SPB253J1

The Seiko Prospex SPB253J1 Black Series Limited Edition is a modern re-interpretation of the brand's 1965 dive watch, the 62MAS. It features a blacked-out stainless steel case with orange and beige accents, inspired by the lights used during night diving. 

General and exterior specifications

• Case: 40.5mm diameter, 47.6mm lug-to-lug, and 13.2mm thick. The case is made of stainless steel with a black hard coating.
• Crystal: Curved sapphire crystal with an anti-reflective coating on the inner surface.
• Bezel: Unidirectional rotating bezel with a black and orange diving scale.
• Dial: Matte black with orange and beige accents and Lumibrite on the hands, indexes, and bezel for readability in low light.
• Water Resistance: 200m (660ft).
• Crown: Screw-down.
• Case back: Screw-down with "LIMITED EDITION" and a serial number engraved.
• Strap: Comes with a brown textile strap and an additional black silicone strap.

 Movement specifications

• Caliber Number: 6R35.
• Power Reserve: Approximately 70 hours when fully wound.
• Accuracy: +25 to -15 seconds per day.
• Jewels: 24.
• Vibrations: 21,600 vibrations per hour (6 beats per second).
• Functions: Date display and a stop-seconds hand function. 

 Features and additional details

• Limited Edition: 5,500 pieces worldwide.
• Luminescence: Lumibrite on hands, indexes, and bezel for enhanced visibility. The luminescence is beige on the hour markers and hour hand, and orange on the minute hand, contrasting with a green glow on the bezel pip.
• Historical Reference: This watch reinterprets the design of Seiko's first dive watch from 1965.
• Strap Material: The brown textile strap is a "Seichu" style, known for its strength and durability.