As mentioned previously it had become Vacheron Constantin that first developed these watches; in 1915 they introduced the rather first anti-magnetic pocket watch. That it was then accompanied by Tissot's non-magnetic wristwatch in 1920, and therefore the first anti-magnetic chronograph by Vacheron Constantin in 1954.
The organization Jaeger Lecoultre improved the chronograph's design and improved its resistance by doubling-up the truth.At this time a worldwide standard the ISO 764 dictates the form of view are able to sustain itself from household power magnetic field exposure of 4,800 Ampere per meter. What's additional, it states so it need to maintain its accuracy to provide or just take 30 seconds/day as calculated prior to a test hard pass for a magnetic-resistant watch.
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