Retrograde refers to a watch complication where the hand moves along a scale and, upon reaching the end, jumps back to the starting point to begin its cycle again.
A retrograde complication has a hand that travels along an arc (rather than full circle), reaches its endpoint, then instantly snaps back to the starting position to begin again. Retrograde displays are used for seconds, date, day, or minutes. The instant return requires precisely engineered spring mechanisms.
Regular seconds hands sweep continuously around a 360° dial. Retrograde seconds travel along an arc (typically 120°-270°), then jump instantaneously back to zero when they reach the endpoint. This creates a visually dramatic effect and demonstrates watchmaking complexity, though it serves the same functional purpose.
Yes, retrograde displays add significant cost due to engineering complexity. The mechanism requires spring-loaded return systems that must snap precisely without jarring the running movement. Retrograde perpetual calendars (with date, day, and month all using retrograde displays) are particularly complex and expensive, found primarily in high-end watchmaking.