Watch Anti-Magnetism Basics
Understanding anti-magnetism specifications for watches is crucial for maintaining their precision and longevity. Japanese watches c
Watch Anti-Magnetism Basics
Understanding anti-magnetism specifications for watches is crucial for maintaining their precision and longevity. Japanese watches categorize their anti-magnetic capabilities into three levels:
– Unmarked for anti-magnetism: Resists magnetic fields up to 1600 A/m (equivalent to 20 gauss).
– Standard anti-magnetism (symbolized by an inverted “U” with a horizontal line beneath): Withstands up to 4800 A/m (60 gauss).
– Enhanced anti-magnetism (an inverted “U” with two horizontal lines beneath): Shields against fields up to 16000 A/m (200 gauss).
When discussing the pinnacle of anti-magnetic watches, the Rolex MILGAUSS stands out. Featuring a custom-made Parachrom hairspring and an almost entirely sealed anti-magnetic iron casing, it elevates anti-magnetic functionality to 100000 A/m, setting a benchmark in the category.
Magnetic Field Attenuation: The strength of a magnetic field decreases with the square of the distance from its source, meaning the further away you are, the weaker the field. Even watches not specifically labeled as anti-magnetic can be safe if kept sufficiently distant (5cm or more) from magnetic sources. Everyday caution can prevent magnetic interference without much hassle.
Common Magnetic Sources: Mobile phones, computer speakers, razors, and even bag clasps can generate magnetic fields strong enough to affect watches.
The Impact of Magnetism on Mechanical Watches: Magnetization can alter the frequency of the balance wheel, affecting the gear system and leading to erratic timekeeping – from stopping entirely to gaining or losing significant time. Once magnetized, a watch won’t demagnetize naturally and requires professional demagnetization to restore function.
Diagnosing a Magnetized Watch: Constantly worrying about magnetization can be distressing. A simple test involves using a compass; if the needle moves dramatically when a watch is near, it’s likely magnetized. A slight movement is normal due to the watch’s metal composition but doesn’t indicate severe magnetization.
This guide should also help in detecting magnetic fields around your watch storage area, ensuring the space is free from harmful magnetic interference. Keep away tools like pliers that might have become magnetized unknowingly, as they too can affect your watch’s performance.
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