The Rolex Submariner Date 116613LB — known to collectors as the "Bluesy" — is the two-tone Yellow Rolesor Submariner that bridged the modern Submariner Date lineage from 2009 through 2020. This 2016 example arrived in the middle of that production window, with Oystersteel and 18k yellow gold construction across both the 40mm Oyster case and the matching two-tone Oyster bracelet. The standout feature is the sunburst blue dial, applied 18k yellow gold hour markers, and the matching blue Cerachrom ceramic bezel with 18k yellow gold 60-minute graduations — a combination unique to the LB designation. Powered by the Rolex Caliber 3135 automatic movement, a workhorse chronometer celebrated for its longevity and serviceability, the 116613LB delivers a 48-hour power reserve, beats at 28,800 vibrations per hour, and carries Superlative Chronometer certification to -2/+2 seconds per day. Chromalight luminescence on the Mercedes hands and hour markers provides the long-duration blue glow that defines modern Rolex sports models, while the unidirectional rotating bezel, screw-down Triplock crown, and 300-meter water resistance preserve the Submariner's status as a true dive watch. The full set includes Rolex box and papers, making this a complete and ready-to-trade two-tone Submariner. Pre-owned, 2016 production.