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There is subtler effect if a spring containing ferromagnetic materials (like Nivarox) is exposed to ambient magnetic fields, the gradual accumulation of magnetism in the alloy can also interfere with the temperature compensation properties of the balance spring and it may begin to run at different rates at different temperatures the issue was described in a 2004 story for the Horological Journal by watchmaker Gideon Levingston was working at the time on carbontime oscillator system.
Which incorporated a carbon fiber balance spring intended to address this very issue if you've been following Kari Voutilainen's work for a while you might even remember that Kari used the Carbontime oscillator in one of his watches, as a Best Replica Watches PuristsPro reported via watchmaker and horological writer Curtis Thomson in 2006 Obviously magnetic fields can be a major problem for watches watch owners and watchmakers in both immediately obvious, and more subtle ways.
Now let's look at two watches built to resist this hazard don't Try this at home for the purposes of the test, the magnet was left on its styrofoam lower box and to prevent damage to both the magnet and the watch, a folded cloth was placed in between the two several earlier experiments with the magnet and ferromagnetic materials (by experiments I mean randomly choosing heavy iron or steel objects to pick up) had produced scratched objects.
A slightly chipped magnet and a sense of the need for an abundance of caution when handling the Hodinkee Demon Core the results were interesting to say the least first watch we tried was the Omega Gauss the watch was placed-extremely carefully-on the magnet and there was no visible effect at allowed to run for 24hours after exposure to the magnet, the watch showed no visible deviation on it's rate either solution used by Omega for this watch is of non-ferromagnetic materials.
For all critical components, including the balance, escape wheel, lever, and balance spring interestingly enough the entire watch, which is cased in stainless steel, showed very little susceptibility to the magnet overall-the force exerted certain wasn't strong enough to pick the watch up, which was very surprising second was the Milgauss one that actually did make me nervous milgauss doesn't mean resistant to a 4,000 gauss permanent neodymium magnet.
It means just what it says: 1,000 gauss much to my surprise, and considerable relief the visible effect on the watch was zero and in fact just as with the omega, there was relatively little attractive force between the case and the bracelet we allowed the Milgauss to run for 24hours as well, and just as with the omega, rate deviation if there was any wasn't visible conclusions and analysis and second hand and instantaneous date with rapid setting.
Several interesting things came out of this little test first of both of these watches apparently successfully shrugged off exposure to a magnetic field far in excess of anything you are likely to encounter in real life at least unless you are the sort of person who likes to order extremely powerful rare earth magnets and stick watches to them secondly, apparently both watches are using so-called austenitic-and therefore, largely amagnetic-stainless steels.
As it turns out, both presumed for the Omega and confirmed for the Best Fake Watches are steels in which, when they cool, the iron crystals are in a non-ferromagnetic form even a magnet as strong as this one produced only a minimal attraction one always imagines a graphically terrifying result in a scenario where you're in an MRI machine wearing a cheap replica Rolex watches, and someone switches it on, but it actually might be a lot less dramatic than many of us thought.
The third interesting point is that there was no discernible difference at all between results from the Milgauss and from the Omega seems surprising at first, but remember, the first 1956 Milgauss had a conventional steel lever and balance spring in its movement and achieved it's high level of resistance through the soft iron casing the latest version of the Milgauss has a non-ferromagnetic Parachrom balance spring and also uses non-ferromagnetic material.
For the escape and lever and it stands to reason that its resistance to Best Fake Watches magnetism should exceed 1000 gauss handily with these enhancements as a matter of fact, the use of a niobium-zirconium alloy and non-ferromagnetic escapement components was the strategy used by IWC, which is equal to nearly 7,000 gauss as we've seen rolex doesn't specify the material used for the inner shielding on the Milgauss, but it's reasonable to assume it's a type of nickel-iron mu-metal.
Mu metals alloys work by providing a preferred pathway for magnetic field lines, which flow around the movement through the enclosure, rather than through the steel parts of the movement it self (the term mu-metal is derived from the Greek letter which symbol for magnetic permeability mu-metals are highly permeable to magnetic fields) by the way may have heard the term soft iron inner case while pure iron is indeed relatively soft compared to steels the term here means soft magnetically.
A hard magnetic material will stay magnetized even after an external field is removed a soft magnetic material will conduct magnetic field lines but will not stay magnetized (which obviously is desirable when you're building a shield around a watch) you also often hear magnetic shields in watches referred to as faraday cages this isn't strictly correct faraday cages can be either mesh or solid enclosures and are for shielding against electrical fields you can make a Faraday enclosure out of copper or aluminum.
Please note that this room is equipped with a rubber strap exclusive design incorporating Breitling Aero classic woven steel bracelet for our rubber mesh Milanese way, we had to develop very complex molds drawers that make this effect visible 3D Turvy, but also on the sides of the clock, says Jean-Paul Girardin, vice president of Breitling Replica.