Attraction issues. (Source: Rolex via IPI.ch)
A patent filed by Rolex with the Swiss Institut Fédéral de la Propriété Intellectuelle reveals the brand is working to improve further the anti-magnetic properties of its watches.
Rolex engineers realized they didn’t need to redesign the Parachrom — or Syloxi — hairspring to raise the current anti-magnetic rating. They just needed to change the composition of the balance wheel with an alloy less conductive to electricity. Rolex said the findings were “surprising and unexpected.”
When Rolex engineers conducted testing with a balance wheel made of lead-free brass, the watch could withstand up to 40,000 gauss, instead of 25,000 gauss with a balance wheel made of copper-beryllium, the alloy in the current collection.
The results are “absolutely remarkable,” Rolex said in the patent. Read more about it here.