The balance cockBalance Cock The balance cock holds the balance spring (or hairspring) in place and allows it to be adjusted. The balance cock is attached to the main plate of the movement and sits above the balance wheel. It serves as the base for the hairspring and the mechanism that allows regulating the timekeeping of the watch. [Learn More] holds the balance springHairspring The hairspring is a thin spring in a mechanical watch movement that is connected to the balance wheel. The balance wheel oscillates back and forth at a consistent rate, and the hairspring helps regulate these oscillations. The hairspring works by applying a restoring force to the balance wheel, which helps to keep the balance wheel oscillating at a consistent rate. The hairspring is also known as a balance spring. [Learn More] (or hairspringHairspring The hairspring is a thin spring in a mechanical watch movement that is connected to the balance wheel. The balance wheel oscillates back and forth at a consistent rate, and the hairspring helps regulate these oscillations. The hairspring works by applying a restoring force to the balance wheel, which helps to keep the balance wheel oscillating at a consistent rate. The hairspring is also known as a balance spring. [Learn More]) in place and allows it to be adjusted. The balance cock is attached to the main plateMainplate The mainplate holds all the components of the watch movement together and forms the base of the watch movement. The mainplate is typically made of brass. It serves as the foundation for the movement, and all the gears, wheels, and other components are attached to it. It holds the jewels and pivots in place, and also serves as the base for the bridges and other structural components. [Learn More] of the movement and sits above the balance wheelBalance Wheel The balance wheel is a component of a mechanical watch movement that oscillates at a consistent rate. It receives a small impulse from the pallet fork, which is part of the escapement mechanism. The balance wheel is connected to a hairspring that controls the rate of oscillation of the balance wheel. The balance wheel and hairspring work together to keep accurate time. The oscillations of the balance wheel drive the timekeeping functions of the watch. The balance wheel is a crucial component of a mechanical watch movement. [Learn More]. It serves as the base for the hairspring and the mechanism that allows regulating the timekeeping of the watch.