Seiko Prospex SPB240J1 1968 Diver's Modern Re-Interpretation Automatic Watch

The Seiko Prospex SPB240J1 is a Boutique Exclusive modern reinterpretation of Seiko’s iconic 1968 diver. Its rich brown sunray dial, black unidirectional bezel and warm rose-gold-tone accents give the watch a distinctive heritage character while retaining the professional durability expected from the Prospex line.

Inside is Seiko’s Caliber 6R35, an automatic mechanical movement with manual winding capability and an approximately 70-hour power reserve. The 42 mm stainless-steel case and bracelet feature Seiko’s super-hard coating, while a sapphire crystal with inner anti-reflective coating protects the dial and improves legibility.

Engineered as a true diver, the SPB240J1 features a screw-down crown and case back, a unidirectional rotating bezel, LumiBrite on the hands and indexes, and 200 m / 20 bar water resistance.

Technical Specifications

• Brand: Seiko
• Collection: Prospex
• Model: SPB240J1
• Series: 1968 Diver’s Modern Re-Interpretation
• Edition: Boutique Exclusive
• Movement: Automatic with manual winding
• Caliber: 6R35
• Jewels: 24
• Power Reserve: Approx. 70 hours
• Accuracy: +25 to -15 seconds per day
• Functions: Hours, minutes, seconds, date
• Case Material: Stainless steel with super-hard coating
• Case Diameter: 42 mm
• Case Thickness: Approx. 12.5 mm
• Lug-to-Lug: Approx. 47.6 mm
• Lug Width: 20 mm
• Crystal: Sapphire crystal
• Crystal Coating: Anti-reflective coating on inner surface
• Dial: Brown sunray with rose-gold-tone details
• Bezel: Black unidirectional rotating bezel
• LumiBrite: Hands, indexes and bezel
• Crown: Screw-down
• Case Back: Screw case back
• Water Resistance: 200 m / 20 bar
• Bracelet: Stainless steel with super-hard coating
• Clasp: Three-fold clasp with secure lock, push-button release and diver extension