I stumbled upon some photos I took of a iron faraday cage from an Omega Seamaster Chronodiver 300m, so I decided to make a short post. Sometimes you might notice that watches have an Anti-Magnetic rating or spec shown on the case back of the watch, and might wonder what that means. Well, since automatic movements are susceptible to magnetic fields which can affect the accuracy of their movement, it is handy for them to have some magnetic protection, especially in this day and age.

That Anti-Magnetic Iron cage or shield is called a Faraday Cage, named after the English Scientist, Michael Faraday. The cage surrounds the movement of the watch and protects it from certain levels of magnetic fields. Some watches that have soft iron Faraday Cages inside: IWC Ingenieur, Omega Seamaster 300m, Rolex Milgauss.

Here is a shot of the Omega 1164 Movement underneath the Iron Cage: