Produced by SJ .Breitling Premier B01 Chronograph 42 RW4PREMIERB01CHRONOGRAPH42 .316L stainless steel, 42mm, domed crystal glass with double anti-reflective treatment, transparent sapphire, original folding clasp. While designing the modern Premier series watch, Breitling retained the design details of the antique Premier watches, including the smooth fixed bezel, dual sub-dial design, streamlined rectangular pushers, and three-dimensional Arabic numerals. The Premier B01 Chronograph 42 offers a variety of dial color options and features the in-house 01 movement, an automatic winding mechanical movement with a frequency of 28,800 vibrations per hour. The crown is non-screw-in and equipped with double sealing gaskets. S1 elegantly recommends this multifunctional mechanical watch for men.