The Rolex Submariner 16613 brings the line's utilitarian roots into a more elevated register, pairing stainless steel with 18K yellow gold in the classic two-tone Date format. Here that character is sharpened by a blue dial, giving this watch the sunlit, unmistakably nautical look collectors associate with the reference. Its automatic movement and date keep the mechanics straightforward and functional. At 40mm, the case wears with the balanced proportions that define the modern-era Submariner.