The "anti-magnetic watch" was originally invented to accurately tell time in the strong magnetic fields that occur inside airplane cockpits. Due to its unique construction, even today, more than 70 years after its invention, the prices of these watches remain high, often in the hundreds of thousands of yen. Currently, it is said that over 60% of mechanical watch users experience some sort of performance issue due to magnetization, and there is a growing demand for a practical anti-magnetic watch that can withstand the increasingly diverse electromagnetic environments at a reasonable price. The Progaus is the strongest anti-magnetic watch available on the market for under 100,000 yen, which was not previously available.