Its resistance to magnetic interference stems from a shield inside the case made of ferromagnetic alloys, which protects the movement. The caliber 3131 movement itself included paramagnetic materials.
The Rolex Milgauss watches are scarce collector’s pieces
Between 1956 and 1988 the Milgauss only had two different models: references 6541 and 1019 and it is fair to say the watch was not that popular compared to the Submariner, GMT Master and others. Collectors had difficulty to understand the importance and relevance of the watch, and in 1988 production ceased.
