How & Why Watches Are Made to Resist Magnets

Why It Matters

Improved magnetic resistance lets mechanical watches maintain precision in everyday environments, expanding their market appeal and justifying premium pricing.

Key Takeaways

• Early antimagnetic experiments began in mid‑1800s with Constantan.
• 1915 watch introduced palladium hairspring, balance wheel, lever shaft.
• Soft‑iron cages shield movements but increase case size.
• Silicon components now provide >15,000 gauss magnetic resistance for watches.
• TAG Heuer’s carbon nano‑composite spring offers weight reduction.

Summary

The video explains that magnetic fields disrupt mechanical watch accuracy, and outlines the century‑long evolution of antimagnetic technologies.

Early experiments by Vashron Constantan in the 1800s led to a 1915 watch featuring a palladium hairspring, balance wheel and lever shaft, while Tissot’s 1930 model used non‑metallic alloys. Mid‑20th‑century brands adopted soft‑iron cages—seen in IWC’s Mark 1, Omega’s Railmaster, Jaeger‑LeCoultre’s Geophysic and Rolex’s Milgauss—to contain magnetic fields, albeit at the cost of larger cases.

Later breakthroughs introduced silicon components: Omega’s 2001 Aquaterra, Rolex’s Seoxy hairspring and the Spyroax hairspring in 2006, delivering resistance above 15,000 gauss. TAG Heuer’s recent TH carbon nano‑composite spring adds non‑magnetic properties, shock resistance and reduced weight.

These innovations enable slimmer, more reliable mechanical watches that retain precision in everyday magnetic environments, reinforcing their premium positioning and competitiveness against quartz and smart‑watch alternatives.

Original Description

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