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2825 Sand Hill Rd
Menlo Park, CA, 94025

(650) 292 0612

Stephen Silver is renowned for our extraordinary ability to procure, design and handcraft the world's finest jewelry and gemstones.

The Stephen Silver Fine Jewelry Estate Collection includes some of the finest pieces from the Edwardian, Victorian, Art Deco, Art Nouveau, and Retro eras. Signed and period pieces are the company's specialty; many of which are from prestigious jewelry houses such as Cartier, Van Cleef & Arpels, Bulgari, Tiffany & Co., and Harry Winston.

The Stephen Silver Fine Jewelry Signature Collection exemplifies modern day luxury combined with old world elegance to produce true works of art. Exquisitely handcrafted in platinum and 18-karat gold, using only the very finest diamonds and colored gemstones, our Signature Collection is exceptional in quality and extraordinary in style.

What It Means When Your Watch Is Anti-Magnetic

Watches

What It Means When Your Watch Is Anti-Magnetic

Annena Sorenson

Did you know that something as simple as using a cell phone (especially with a rechargeable cell phone cover), going through airport security and even flying can affect the accuracy of your mechanical watch? Microwaves, handbags with magnetic closures, certain electrical instruments and some medical testing equipment can also have a negative impact on your mechanical timepiece.

Essentially, when a watch that is not deemed "anti-magnetic" comes into contact with a magnetic force field, the inner escapement of the watch can stutter, causing a slight-to-moderate impact on timing accuracy. Some people have reported that in certain instances, their timepiece just stops working. This is why certain watch brands take steps to ensure that their watches — especially pilot watches that are exposed to magnetic fields when flying — are anti-magnetic.

The concept of anti-magnetism in watches was first developed back in the 1930s when military pilots had issues with their watches stopping or becoming inaccurate. Generally, IWC Schaffhausen is credited with developing the first-ever anti-magnetic watch, and it did so by building a soft iron inner case that could reside within the outside case, but cover and protect the movement parts that were made of metals affected by magnetism. For decades, that inner iron case was the only way watch brands could find to protect the movements, and certain brands developed their own inner anti-magnetic iron cases — predominantly for pilot watches.

In recent decades, though, the use of high-tech alloys in watch movements have helped to render these watches anti-magnetic. These alloys include silicon, Glucydur, Elinvar and more. When mainsprings, escapements and hairsprings inside the watch are made of these materials, the watch becomes anti-magnetic without needing an iron inner case to protect it.

Essentially, an anti-magnetic watch can run with minimal deviation in time tracking when exposed to magnetic fields. The International Organization for Standardization has issued a standard for magnetic resistant watches: ISO 764 Horology - Magnetic. It states that a watch must keep its accuracy to +/- 30 seconds a day to be deemed magnetic resistant.

If you are continually exposed to magnetic fields, and have not experienced any timing issues with your mechanical watch, bravo. If you have had some issues, stop in any time to let us help you find the right watch for your wrist that is anti-magnetic and still suits your personal tastes.