Explanation of the history and chronology of MILGAUSS products

Cal.3131
Power reserve: approx. 48 hours Water resistance: 100m Case size: 40mm

The current Milgauss was released at the same time as the third-generation Milgauss Ref.116400. The only one currently on sale is the Ref.116400GV. There is not much difference between it and the Ref.116400, and the movement and lightning hands are the same, both in orange. The clear difference from the third-generation model is that the sapphire crystal windshield is colored green, which is Rolex's corporate color. GV is the initial of Glace Verte (meaning green glass) in French. The reason for using green, the Rolex color, in the glass is that it was a model that had an anniversary meaning of the revival of the Milgauss at the time. In addition, Rolex usually has a watermarked crown mark at the 6 o'clock position, but this feature is not seen on the sapphire crystal glass of the Milgauss. In 2014, a new blue color called the Z Blue dial was introduced. The zirconium contained in the blue paint is used for the primer and plating process of the dial, bringing out the blue color of the zirconium and expressing a beautiful blue color.

Cal.3131
Power reserve: approx. 48 hours Water resistance: 100m Case size: 40mm

In 2007, 20 years after the end of production of the second generation, the third generation Milgauss was reborn. One of the reasons for this is thought to be the widespread awareness of magnetic fields that came with the sudden popularity of mobile phones around 2000. The design combines the lightning second hand of the first model with the simple and stylish smooth bezel of the second generation, and has the same magnetic resistance of 1000 gauss as the first generation. A smooth bezel is used for the rotating bezel. Another major feature is the new magnetic resistance structure. The case has a built-in soft iron inner case, which is thicker than other models of the same case size. In addition to the blue Parachrom hairspring, the movement is equipped with Cal.3131, a movement exclusive to the Milgauss. Combined with the use of other technologies and materials, magnetic resistance has been further improved and accuracy has become more stable.

Cal.1580
Power reserve: approx. 48 hours Water resistance: 50m Case size: 37mm

The second generation Milgauss. The design was changed significantly from the first generation. The rotating bezel and lightning second hand from the first generation were gone, replaced with a straight second hand. The dial was changed to a bar index. Compared to other models, the ROLEX logo design is also large, but overall it is a model with a simple design that leaves an impression. This model was manufactured for about 30 years, but it underwent several minor changes during the production period, so the hairline finish dial, which is only found on early models, is extremely rare.

Cal.1065M, Cal.1066M, Cal.1080
Power reserve: approx. 48 hours Water resistance: 50m Case size: 37mm

The first Milgauss. The 37mm case, which was made to maintain anti-magnetic performance, has a strong presence, a lightning-type second hand, and a black dial with dot indexes, giving it a dignified impression. This model was equipped with a rotating bezel, but it was later changed to a smooth bezel with a polished finish. Since then, minor changes have been made, such as the inclusion of an automatic movement. There were only a few first-generation Milgauss watches before they were discontinued in 1987, and the first generation in particular is a highly sought-after collector's item, especially among Rolex vintage watches, and is highly prized as a rare collector's item.