Introduced in 1944, the Tri-Compax was the first industrialized full-calendar chronograph, making it one of the most complex watches of its time. The model features day, date, month, and moonphase indicators, all powered by an in-house caliber. This complex movement highlights Universal Genève’s engineering prowess at a time when such achievements were (and remain) rare for independent watchmakers. Despite its complexity, the watch achieves a clean and uncluttered dial design, all in a 36-mm diameter and 12.5-mm thickness. In the 1960s, the Tri-Compax was re-released as a sports watch, gaining iconic status when it was frequently worn by the legendary musician Eric Clapton.​