Rolex Oyster Perpetual Submariner Date 126613LB
Concept & History
The reference 126613LB was introduced in 2020 as the successor to the reference 116613LB and marks the transition of the two-tone Yellow Rolesor Submariner line to the larger 41-mm case and the Caliber 3235. Among collectors, this combination of Oystersteel, yellow gold, and a blue dial has come to be known as the “Bluesy,” a nickname that refers to the two-tone version of the Submariner Date with a blue dial. The Submariner series itself dates back to 1953 and is one of the first wristwatches in watchmaking history designed for professional diving.
Caliber & Technology
This model is powered by the in-house caliber 3235, an automatic movement with a bidirectional rotor developed and manufactured entirely by Rolex. The Chronergy escapement, made of paramagnetic nickel-phosphorus, enhances efficiency, while the blue Parachrom hairspring with a Rolex-specific terminal curve ensures shock resistance and immunity to magnetic fields. Regulation is achieved via four gold Microstella nuts on the solid balance bridge. The power reserve is 70 hours, and the frequency is 28,800 vibrations per hour. Certified as a Superlative Chronometer, the movement maintains a precision of -2/+2 seconds per day after calibration.
Case & Material
The Oyster case, crafted from Oystersteel and yellow gold (Yellow Rolesor), measures 41 mm in diameter and features a monobloc middle case with a screw-down case back and a screw-down Triplock crown. The unidirectional rotating bezel features a blue Cerachrom ceramic insert with gold-plated scales and numerals; the 60-minute scale allows for precise reading of elapsed dive times. This design ensures water resistance to 300 meters. A domed sapphire crystal with anti-reflective coating on both sides and a Cyclops lens over the date protects the dial.
Aesthetics & Readability
The Royal Blue dial features Mercedes- and Breguet-style hour and minute hands with Chromalight luminescent material, as do the applied hour markers framed in yellow gold, which match the color of the two-tone case. The long-lasting blue Chromalight coating ensures excellent readability of the time and dive time even in low light and underwater. The three-piece Oyster bracelet with an Oysterlock folding clasp and Glidelock fine-adjustment system completes the technically oriented appearance of this very well-preserved example.
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For more information, see Technical Details.
