ALS: Again it depends on the complexity of the watch, the number of complications and if the development involves the construction of a new basis calibre. The average time may vary from three to five years, in exceptional cases it may take even longer.

Manual and automatic movements are mechanical; they are both made up of only mechanical parts like gears and springs. The quartz and auto-quartz movements have an electrical circuit and require a battery to run but may also have some mechanical parts.