Tissot Gentleman Powermatic 80 Silicium Automatic T127.407.11.041.00 T1274071104100 100M Men's WatchUse of silicon in the Silicium prevents interference between the watch movement and the magnetic fields generated by electronics. The silicon mainspring offers far greater magnetic resistance than any other everyday watch. Magnetic fields from mobile phones and other electronic gadgets and closures can’t affect it the way it can others; it makes Tissot become more accurate than ever before.