What is a Breguet Overcoil Hairspring?
– A Breguet Overcoil Hairspring is similar to the regular flat versions but has a sharply curved outer end. The sharp curvature results in a greater concentric development.
What is a Breguet Overcoil Hairspring?
– A Breguet Overcoil Hairspring is similar to the regular flat versions but has a sharply curved outer end. The sharp curvature results in a greater concentric development.