SJ Production, Shanghai 4130, Dandong 4130 .C1 Production, Rolex MK1 Daytona Rainbow Series, highest version, uniquely customized large gold-plated platinum eye, paired with authentic Dandong integrated movement. Recognize the ruby centered on the dial, the only matching movement, a pinnacle of craftsmanship and elegance, with a three-code integration. Comes with NFC sensing card, watch code 218WF999, watch buckle code 7CD! The only matching code, certified by the code, quality guaranteed! .The king of Rolex Daytona - the Rainbow Circle Daytona series, uniquely customized large gold-plated platinum eye, highest version. The essence of the high-quality, high-end custom version of the Rainbow Daytona lies in the color gradient of the outer circle of gemstones. Natural stones have more or less defects, and the selected gemstones undergo optimization to achieve a pure, transparent, and rich texture. C1 factory has selected and matched the most harmoniously transitioning 36 gemstones from tens of thousands of options. The most challenging part is that the watch is a small-scale production model, requiring not just one set of gradient gemstones, but at least dozens of sets to produce the corresponding number of watches, resulting in extremely limited production. The hour markers on the dial use square-cut rainbow gradient gemstones, and the three chronograph sub-dials employ a technique called Gold Crystals, presenting a layered effect reminiscent of the Widmanst?tten pattern of nickel-iron meteorites. When the watch is moved, the irregular patterns on the Gold Crystals refract light differently, creating a flickering and profound visual effect.The rainbow is a treasure bestowed upon humanity by nature. C1 Production, watch code 218WF999, watch buckle code 7CD, three codes in one, with NFC, sensing card, high-end version! A commitment to exceptional quality, creating a harmonious color symphony, defining the Rainbow Daytona S1, a refined recommendation for men's multifunctional mechanical watch.