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Pre-Owned Spotlight: Anti-Magnetic Greats

Govberg Jewelers is back for iW’s weekly Pre-Owned Spotlight series. Check out 6 pre-owned timepieces from their ever-rotating complete inventory. Last week, Govberg explored the history of the anti-magnetic watch so it is only fitting to take a look at some of the top anti-magnetic watches!

To be labeled as an anti-magnetic watch, the watch must pass the International Standard 764 which states the watch must resist explosion to a direct magnetic field of 4,800A/m and keep accuracy to +/- 30 seconds/day.

Stop by next Saturday for the latest in pre-owned shopping. For direct assistance with any of the watches listed call their Concierge department directly at: 888-885-7552.

Anti-Magnetic Watches

Bremont Martin Baker II MBII/OR

Anti-magnetic watches have gone hand in hand with flight since the 1940s. Bremont continues the legacy with their Martin Baker II (MBII) model. Martin-Baker supplies 70% of the world’s Air Forces with fighter ejection seat technology. The MB line has gone under rigorous testing, just like the ejection seats. The movement and mechanism of the MBII has been designed to float within Bremont’s Trip-Tick case, attaching the inner case to a flexible ring. This inner case works the same as a Faraday cage and provides an anti-magnetic shield. The MBII is anti-magnetic to 80,000 A/m or just under 1,000 Gauss. Govberg Price: $3,795.

Omega Seamaster Aqua Terra >15,000 Gauss 231.10.42.21.01.002

Omega created an incredible movement housed inside the Aqua Terra >15,000 Gauss. Of course, we’re talking about the 8508, built with some pretty unique parts. While no one outside of Omega truly knows the components making up the movement, we do know that there is a silicon balance spring, Nivagauss and other non-magnetic materials to complete the movement. What you may have been able to surmise form the name of the watch, it is anti-magnetic to over 15,000 Gauss and being the first fully anti-magnetic mechanical watch and movement. Typically anti-magnetic watches need to be completely solid, a solid case back and time only function, as to not disrupt the Faraday Cage. Thanks to the components in this movement, the watch is able to have a display case back showing off the movement. Bonus: Govberg did a hands on review of this watch on YouTube! Govberg Price: $4,450.

Rolex Milgauss 116400GV

The Rolex Milgauss is one of the most well-known anti-magnetic watches, even its name means it’s anti-magnetic. The French word for 1,000 Gauss is Mill Gauss. Rolex took this and created their Milgauss in 1956. They were originally commissioned by CERN scientists who worked in labs with extreme levels of magnetism. The 904L steel used in the Milgauss cools so that the iron crystals become non-ferromagnetic, adding an extra layer of anti-magnetic qualities. Rolex doesn’t give away their secrets of the inner shielding and materials used in the watch but we do know they use non-ferromagnetic material in the escape wheel, lever and balance spring. On the seconds hand of the Milgauss is the emblematic lightning bolt distinguishing its anti-magnetic qualities. Govberg Price: $5,950.

IWC Ingenieur Double Chronograph IW3865-01

IWC designed the Ingenieur in the 1950s to be worn by engineers, technicians and other employees working in highly magnetic environments. Their answer was the Ingenieur Ref. 666 and was marked with the thunderbolt symbol around the model name, representing its anti-magnetic abilities. The watch has continued to evolve in style but the anti-magnetic properties remain. The Double Chronograph uses materials typically found in Formula 1 Racing: titanium, ceramic and rubber. The power house behind the case is the Cal 79420 split seconds, allowing you to record stops and laps while the stopwatch continues. This caliber is also housed in the soft-iron inner case, forming a Faraday cage and is anti-magnetic to just under 1,000 Gauss. For being anti-magnetic the Double Chronograph has quite a few functions including day date, and chronograph. Govberg Price: $6,350.

Vacheron Constantin Overseas Perpetual Chronograph 49020/000W-9656

Vacheron Constantin was one of the first watchmakers to experiment with working with anti-magnetic qualities and succeeded in 1915, 60 years after beginning experiments. To succeed, Vacheron used palladium, an antimagnetic material, for the escapement components. From the 19th century through to today, Vahcheron has worked with advanced technical characteristics of anti-magnetism and waterproofness. Both of these qualities can be found in the Overseas collection. These elegant sports watches feature a soft-iron, Faraday, cage surrounding the movement to protect it against strong magnetic fields. Bonus: Govberg did a hands on review of this model on YouTube! Govberg Price: $47,500.

Patek Philippe Grand Complication Perpetual Calendar 5496P-014

Anti-magnetism may not be the first thing you think of when you take a look at the Patek Philippe 5496P, Grand Complication Perpetual Calendar. In fact, this platinum watch features ceramic rotor bearings and an anti-magnetic hairspring. These parts are found within the caliber 324, which powers the watch. The hairspring is created using the Patek Patented Spiromax made of Silinvar, a revolutionary material based on monocrystalline silicon. The Spiromax spring are designed to maintain accuracy and consistency. This version of the 5496 was released in 2014 and features the incredible Honey Brown dial color. Bonus: Govberg did a hands on review of this model on YouTube! Govberg Price: $73,500.

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