In horology, an assortment is a set of parts that form a unitary part of a watch.
Historically, "assortment" can generally refer to a number of different component sets:
- Lever Assortment - The escape wheel, pallets, and roller
- Cylinder Assortment - The escape wheel and cylinder
- Case Assortment - The pendant, crown, and fob
In modern times, it is the regulating organ that is generally implied when one says "assortment", that is, the escape wheel, balance wheel, hairspring, anchor lever, pallet stones, and associated bridges. These are typically mounted together on a bridge and can be sourced separately from the ebauche, which includes the plates, wheel train, winding system, stem and crown, and other components.