Reference RB1510251B1P1 houses a rattrapante complication that allows the simultaneous timing of multiple events — a technical achievement visible through the exhibition caseback. The 42mm case is crafted in 18k red gold and fitted with a cambered sapphire crystal, while luminescent hands and Arabic numeral markers ensure legibility against the black dial. A fixed bezel and water resistance to 100 meters round out the specification.
The black alligator leather strap lends a classic, formal character that suits the warmth of the red gold case. A 70-hour power reserve means the movement continues running reliably well beyond a standard weekend away from the wrist.
Offered in full set condition with its original box and papers, this Premier B15 Duograph represents the intersection of vintage-inspired design and genuine mechanical complexity for the collector who values both in equal measure.
