• Balance Wheel
• Quartz Control (no contacts)

An unusual beast! Not many manufacturers produced quartz-controlled balance wheel movements: only Record-Golay, Porta, Citizen, Luch and Timex.

In the first picture, the Timex Model 63, produced in 1973, has a Moving Coil, Quartz-Controlled movement while the second picture shows a Luch 3055, produced in 1981, with a Fixed Coil, Quartz-Controlled movement,