As mentioned previously it had become Vacheron Constantin that first developed these watches; in 1915 they introduced the very 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.Today a worldwide standard the ISO 764 dictates the form of watch are able to sustain itself from household power magnetic field exposure of 4,800 Ampere per meter. What's more, it states so it should maintain its accuracy to provide or take 30 seconds/day as calculated prior to a test hard pass for a magnetic-resistant watch.
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