The Chronomat B01 in reference RB0134721B1S2 makes an immediate impression through its 42mm round case crafted from gem-set 18k red gold. A uni-directional rotating bezel frames the black analog dial, where luminescent index hour markers and luminescent hands ensure confident readability. The cambered sapphire crystal sits overhead, while a rubber strap in black with a fold clasp secures the watch to the wrist.
Power comes from a self-winding mechanical movement that drives the full suite of chronograph functions. Water resistance is rated to 200 meters / 660 feet, underscoring the technical foundation beneath the precious-metal exterior. The case shape, materials, and dial layout reflect the Chronomat lineage while the gem-set red gold construction gives this particular reference a distinctly elevated character.
This example is unworn and dated to 2025, accompanied by its original box and original papers. The unisex 42mm sizing and the combination of rubber strap with precious-metal case make it a versatile addition to any serious collection.
