What is an Elinvar Hairspring? Picture this: you’re a railroad worker in the 1800s, and your pocket watch is basically your lifeline. Miss the timing by even a few minutes, and you might be looking at a catastrophic train collision. No pressure, right? That’s where the story of the elinvar hairspring begins – born out of necessity when America’s expanding railroad network demanded timepieces that could handle whatever Mother Nature.. Read More