Automatic watches, like all mechanical watches can be affected by magnetic fields.When a watch’s movement is exposed to a strong magnetic fieldthe metal components within the movement can become magnetizedcausing the watch to run fast or slow, or even stop altogether. This is known as magnetization.
However, the degree to which an automatic watch is susceptible to magnetization can depend on a variety of factors, including the strength of the magnetic field, the quality of the movement, and the materials used in the watch’s construction.
Overall, while automatic watches can be affected by magnetic fields,the level of susceptibility can vary depending on a number of factors. If you are concerned about magnetization, you can have your watch serviced regularly to ensure it runs accurately.