A rare and exceptionally elegant Longines Ultra-Chron Ref. 8348, crafted in solid 18 kt yellow gold and preserved in mint condition. Dating from the early 1970s, this unusual model features the distinctive Ultra-Chron case design with its characteristic faceted architecture and twelve-sided caseback. The refined dial is complemented by applied baton hour markers, elegant hands, central seconds and a date aperture, creating a sophisticated yet highly functional vintage aesthetic. At its heart is the legendary Longines Calibre 431, an automatic high-frequency movement beating at 36,000 vibrations per hour (5 Hz), developed for the Ultra-Chron collection and renowned for its exceptional precision and remarkably smooth seconds-hand motion. A particularly desirable and uncommon solid-gold reference, the 8348 represents one of the most refined expressions of Longines’ high-frequency watchmaking of the period.