dial wheel
/ˈdʌɪəl ˌwiːl/noun
1 Watchmaking and Clockmaking. One of the gearwheels between the dial and the pillar-plate, which turn one or other of the hands.
2A wheel in a piece of apparatus that by its turning serves to indicate, count, measure, or control in some way.
3A dial on a telephone.
Origin
Late 17th century; earliest use found in John Smith. From dial + wheel.