The Rolex Milgauss Z-Blue Dial (Ref. 116400GV) is one of the most distinctive and technically fascinating watches in the Rolex catalog—designed for professionals working in environments with strong magnetic fields, such as laboratories, medical facilities, and research institutes.
First launched in 1956 and revived in modern form in 2007, the Milgauss is named for its unique ability to resist magnetic fields of up to 1,000 gauss (hence “Milgauss”). The model was officially discontinued in 2023, adding to its collector appeal, especially in the Z-Blue dial variant introduced in 2014.
This version features a vibrant sunburst blue dial, accented by orange minute markers, a lightning bolt-shaped seconds hand, and applied white gold luminous baton indices. The green-tinted sapphire crystal (GV = Glace Verte) is unique to the Milgauss line and gives the watch a distinctive glow and color shift depending on lighting.
Inside, the Milgauss is powered by the Calibre 3131, an automatic movement designed specifically to counter electromagnetic interference. It achieves this through a soft iron Faraday cage around the movement and the use of non-magnetic components like a paramagnetic blue Parachrom hairspring. The movement also delivers a 48-hour power reserve and is COSC-certified as a chronometer.
The 40 mm Oyster case, crafted from corrosion-resistant 904L Oystersteel, is water-resistant to 100 meters (330 feet) and finished with a satin-brushed and polished surface. The Oyster bracelet with Easylink extension allows for daily comfort adjustments.
The Rolex Milgauss is a cult-favorite within the brand’s lineup, prized for its scientific roots, quirky details, and striking aesthetics. The Z-Blue dial with green sapphire remains the most iconic version—bold, technical, and unmistakably different from the average Rolex.
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