Produced 2025–present. The H03421-A is the exact 2025 HYT T1 Titanium Guilloché configuration, documented with its 501-CM hydromechanical movement, 45.3 mm case, hand-guilloché blue with black fluid display, fluidic functions, exact…
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Specifications, configurations, image gallery, market listings, lineage and notable appearances are part of the full reference.