The Rolex 16613 is a two-tone Submariner in stainless steel and yellow gold, with a dressier feel than an all-steel model. Its black dial keeps the look straightforward, and the matching steel and yellow gold bracelet gives the watch a cleaner balance between sport and formality. It runs on an automatic movement with a date display. At 40mm by 13mm, it wears with the familiar proportions of this Submariner generation.