What pocket watch is made of
A portable spring-driven watch; early examples are linked to Peter Henlein.
- Mainspring — has part. The mainspring stores the energy.
- Balance wheel — has part. The balance wheel with its hairspring sets the frequency.
- Gear — has part. The wheel train carries energy to the hands.
- Escapement — has part. The lever escapement links the balance and the wheel train.
- Brass — is made of. The movement of a pocket watch is brass.
- Iron — is made of. The spring and arbors are iron.