
Magnetism was, through most of the history of watchmaking, a significant problem. The issue was at the very heart of the watch itself. There are two coiled springs inside a watch –one, the mainspring, provides power. The other, far more delicate, is the spiral balance spring, so thin that it’s also called the hairspring. Its inner coil is attached to the axis of the balance wheel, and its outer end is fixed to the plate of the watch; it’s what determines how fast, and how regularly, the balance swings back and forth (in other words, how fast it ticks.) As READ MORE