Ultra-Chron

The Longines Ultra-Chron revives a historic name from the brand’s late-1960s high-beat era, now reimagined with modern engineering. This model draws on the legacy of Longines’ pioneering high-frequency movements, originally designed to deliver superior accuracy for timing professionals and sports officials. Its bold 43mm cushion case and retro dial details pay homage to the original Ultra-Chron Diver, making it a conversation piece for collectors who value both heritage and performance.

Current Ultra-Chron models house the in-house caliber L836.6, running at 36,000 vibrations per hour—an uncommon spec that sets it apart from standard automatics. Water resistance is rated to 300 meters, and the sapphire bezel insert and applied markers elevate its vintage-inspired look. Collectors often compare the steel bracelet and rubber strap variants; the bracelet commands a premium due to its period-correct design and finishing.

Reference numbers like L2.836.4.52.9 (rubber) and L2.836.4.52.6 (bracelet) are key when searching listings, as box/papers and the original strap/bracelet package can influence pricing. Early reissue pieces with the “Diver’s” caseback engraving tend to attract higher demand. Condition is critical—look for crisp chamfers on the case and intact lume plots, as over-polishing and moisture intrusion can affect value. This Ultra-Chron is a strong choice for anyone seeking a modern high-beat diver with true vintage pedigree.