Faithful to its aeronautical origins, the BR S with its 39 mm diameter is the smallest version of the AVIATION collection. The BR S draws its inspiration from history while using the most modern techniques to withstand the effects of time... The matte black ceramic case is scratch-proof, unalterable in color and lightweight.The present example features a black ceramic case, a black dial with oversized Arabic numerals and a rubber strap.Reference BRS-BLC-MAT/SRB