Know Your Watch Parts

Here are a few images showing the commonly used names of some parts of mechanical pocketwatches that can be seen from the outside.

This first one shows the back of an 18 size Elgin movement. The balance wheel and regulator are prominent, but everything else is covered up on this style of watch.

This is an open-face watch case. The glass covering the dial and hands is the crystal.

On this style of movement, more parts can be seen from the back.

The balance assembly, or balance complete, is made up of the balance wheel, the staff, the hairspring and (underneath) the roller table, which is on the other side.

This is the train of a watch, from the barrel to the escape wheel. Not all watches have the same train parts, but the majority do, although the exact layout can vary.

The escapement consists of the escape wheel and pallet.