Longines Ultra-Chron Automatic Yellow Gold

Very rare and superb Longines wristwatch, Ultra-Chron model, in 18-carat yellow gold, reference 7828-1, produced in 1969 – information confirmed by the Longines Heritage Department.

The beautiful brown dial perfectly contrasts with the yellow gold. The high-frequency movement, revolutionary at the time of its introduction, has recently been serviced and functions perfectly.

In short, an elegant watch, technically innovative, preserved in excellent aesthetic and mechanical condition – a piece for the discerning collector.

The Longines Ultra-Chron represents a significant milestone in the history of watchmaking, marking Longines’ continued commitment to technical innovation and precision. Launched in 1967, on the occasion of the brand’s centenary, this watch is distinguished by its high-frequency movement, an advanced technical feature aimed at providing unmatched accuracy at the time.

At the heart of the Ultra-Chron lies a revolutionary movement, the Longines caliber 431 certified chronometer, operating at 36,000 vibrations per hour. This frequency, considerably higher than the 19,800, 21,600, and sometimes 28,800 A/h of the time, significantly reduced the effects of external disturbances on the watch’s accuracy, thus offering increased precision even under various usage conditions. The Ultra-Chron movement was so precise that Longines guaranteed it a precision of ± 5 seconds/day, a feat at the time of its release.

The aesthetics of the Ultra-Chron remain true to the spirit of Longines, combining classic elegance with optimal readability. The 18-carat yellow gold case is robust and polished, the lugs feature sharp chamfered angles, reflecting a style that is both sporty and refined. The dial is highly readable, with hour markers and hands echoing the facets observed on the case.

Our example is presented in excellent aesthetic and mechanical condition. The case retains very sharp angles, the characteristic Ultra-Chron medallion on the gold case back is deep, crisp, and retains its sandblasted appearance, and the original brown “confetti” crosshair dial is flawless. Having been fully serviced by one of our watchmakers specializing in vintage models, the chronometric performance of this watch is excellent. During this service, the plexiglass crystal and the leather strap were also replaced with new ones.

We also had the pleasure of receiving confirmation of the production of this watch in 1969, as evidenced by the information provided by the Heritage Department of the Longines Watch Company Francillon SA, based on the serial numbers 15’566’xxx (case) and 50’322’xxx (movement) that we provided.

The Longines Ultra-Chron thus continues to traverse eras and is coveted by connoisseurs, recognized for its rarity, extreme precision, and timeless design, while remaining accessible.

Excellent aesthetic and mechanical condition. The case retains very sharp angles, the characteristic Ultra-Chron medallion on the gold case back is deep, crisp, and retains its sandblasted appearance, and the original brown “confetti” crosshair dial is flawless.

Having been fully serviced, the chronometric performance of this watch is excellent. During this service, the plexiglass crystal and the leather strap were also replaced with new ones.