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The Seiko Prospex SPB455J1 is a remarkable dive watch that continues Seiko’s legacy of creating high-quality, professional-grade timepieces. The SPB455J1 is part of Seiko’s Prospex collection, which stands for “Professional Specifications.” This model is a modern reinterpretation of Seiko’s first dive watch, the 62MAS, introduced in 1965. The 62MAS was a groundbreaking watch that set the standard for Seiko’s future dive watches.
The SPB455J1 was introduced in 2024 as part of a trio of new models, including the SPB451 and SPB453. These watches are designed to honor the original 62MAS while incorporating modern updates. The SPB455J1 features a slightly reduced case size, improved water resistance, and a better power reserve compared to its predecessors.
This model is powered by the Seiko Caliber 6R55 automatic movement, which offers a 72-hour power reserve. The movement is known for its reliability and precision, ticking at 21,600 vibrations per hour. The watch is water-resistant up to 300 meters, making it suitable for professional diving.
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