The characteristic element of the Black Bay Bronze is an imposing bronze case, 43 mm in diameter, which is an aesthetic reference to the use of bronze in historic ships and other diving equipment. This "living" metal, a high-performance aluminium-copper alloy used in naval engineering for submerged parts that need to be highly resistant to corrosion, will produce a subtle, unique patina, based on the wearer's habits. In addition to a highly functional appearance, the Black Bay Bronze presents entirely satin-brushed finishes that guarantee homogeneous development of the patina.