Longines Ultra-Chron gold

A striking example of Longines’ technical mastery, the Ultra-Chron Ref. 8457-1 from 1970 stands out with its large 39mm 18k yellow gold monobloc case, weighing a substantial 22.2 grams of solid gold. Known for pushing the boundaries of precision, the Ultra-Chron line housed the legendary Caliber 431, a high-beat movement operating at an impressive 36,000 vibrations per hour — a hallmark of accuracy and reliability during its era.

This particular piece, with serial number in the 50 million range, is preserved in incredible condition that truly captivates collectors. The case shows sharp, well-defined edges and the original polishing, avoiding over-refinishing, while the dial remains pristine with clear markers and no visible flaws. The plasting crystal protects the dial flawlessly, and the crown and hands retain their original finish, adding to the watch’s unspoiled allure.

The Ultra-Chron’s substantial size was ahead of its time in the 1970s, making it a bold yet elegant statement piece. With its luxurious 18k gold construction combined with Longines’ renowned precision engineering, this watch perfectly marries style and performance — a rare gem for enthusiasts of vintage high-frequency timepieces.