The Seiko Prospex SPB475J1 is a striking U.S. Limited Edition reinterpretation of Seiko’s 1968 diver’s watch, offering both true Prospex dive capability and second time-zone functionality. With its vibrant gradated turquoise-blue dial and bronze-tone GMT hand, this model celebrates Seiko’s heritage in sports watches with a unique modern twist.
Powered by Seiko’s in-house Caliber 6R54 automatic GMT movement, the SPB475J1 delivers reliable mechanical performance with an approximate 72-hour power reserve. The GMT function — with independently adjustable 24-hour hand — makes this watch well suited for travel and frequent cross-time-zone wear.
The watch is housed in a robust 42 mm stainless steel case with a durable unidirectional bezel featuring a ceramic display and a sapphire crystal with internal anti-reflective coating for excellent clarity. Its 200 m water resistance and solid screw-down crown/ case back make it both a capable diver and an everyday sport watch.
Limited to a small production run (approximately 500 pieces), the SPB475J1 is engraved with its individual serial number on the case back, making it an attractive piece for collectors and enthusiasts.
Key Specifications:
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Reference: SPB475J1
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Movement: Automatic (Seiko Caliber 6R54 with GMT)
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Power Reserve: Approx. 72 hours
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Case Size: 42 mm
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Case Material: Stainless steel with super-hard coating
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Crystal: Sapphire with anti-reflective coating
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Bezel: Unidirectional with ceramic display
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Water Resistance: 200 m (Prospex diver’s)
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Bracelet: Stainless steel with secure clasp and diver’s extender
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Dial Color: Turquoise / blue-green gradient
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Limited Edition: US limited (~500 pieces)
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Condition: Brand New
All watches are inspected prior to shipping.





HoKei Pang, HK (verified owner) –
Watch sold as described, clear pictures. Fast shipping. Only surprise was the box came without any bubble wrap for protection, only the DHL plastic bag. Might be the customs discarded it.
— Verified buyer via Catawiki