INSTANTANEOUS

In watchmaking, a Display is said to be instantaneous when the Indicator jumps from one value to the next almost immediately, in a fraction of a second, instead of progressing slowly. This behavior contrasts with a so-called “dragging” change, where the Hand or the Disc moves gradually over a range of Time. The instantaneous jump frequently concerns the Date / Calendar (the Date which Lever / Rocker net at midnight), but also the Day, jumping hours, or calendar indications. It relies on a Winding and Release mechanism: a spring gradually winds up over the course of the hour, then is suddenly released at the desired moment, projecting the indicator onto its new position. This mechanism, more complex than a simple drive, requires carefully managed energy so as not to disturb the running of the Movement. Instantaneous display is appreciated for its readability and precision of switchover; it represents a mark of technical sophistication, particularly on finely crafted calendars and date displays.