Produced 2025–present. Chapter 4 GMT Tourbillon Limited Edition, model code Chapter 4.18, is the exact 2025 BA111OD release documented by the manufacturer, with its BA.01 movement, 44 mm grade 5 titanium with 5n pvd treatment case, exact…
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Specifications, configurations, image gallery, market listings, lineage and notable appearances are part of the full reference.