Tudor Black Bay S&G Watch, 39mm Black Dial, M79663-0001Enhancing the Black Bay with yellow gold capping creates a version named S&G, for Steel & Gold. TUDOR derived the characteristic aesthetic elements of the Black Bay S&G model from its history. The overall shape, as well as the domed dial and crystal, come from the first TUDOR divers watches. In this version the lines and proportions of the Black Bay are retained, while the rotating bezel and the winding crown are capped with yellow gold.