The new Omega Seamaster Aqua Terra is rated to 15,000 gauss based on new materials used in the movement.
Others movements are encased in soft iron including the extra thick dial making them achieve the rating e.g the PRS2 Dreadnought to 30,000 a/m and the Kobold Seal to 80,000. I happen to know as I own a case cracker.
I believe watches use steel alloy balance springs to avoid their magnetizing.
I have a watch that is stamped 70,000 a/m.
I don't believe it is.
It is a steel case, I assume 316L. It has a 'normal' thickness dial made of a copper colored metal. The bog standard Miyota 9015. It was $400 shipped new, so no special alloys in the steel or modifications to the movement and the movement holder is exactly that, not a special magnetic deflecting piece of metal. No movement cover, just a regular back.
I have emailed the company to ask, but no reply which is odd as pre and post- sale communication was immediate.
I like and wear the watch daily, so I am not particularly perturbed, more wondering.
Thought or comments?