Premier B01 Chronograph 42

From the retailer listing

Mid-century elegance and time-honored performance This stunning Premier B01 Chronograph features a 42 mm stainless steel case. Its striking blue dial is highlighted by contrasting black small seconds and 30-minute chronograph counters that indicate the Manufacture mechanical movement inside. A transparent sapphire caseback reveals its self-winding high-performance chronometer-certified chronograph caliber, the Manufacture Breitling Caliber 01, which is delivered with a five-year warranty. Elegance and performance worthy of the Breitling Premier name.