Longines Ultra-Chron Vintage 33mm Automatic – Ref. 69-556 | Caliber 431 High-Beat Movement

A beautiful testament to Longines’ legacy of precision watchmaking, this Longines Ultra-Chron Ref. 69-556 is an exceptional vintage timepiece from the golden era of horology. Housed in a 33mm 14k yellow gold-plated case with a slim 9.4mm profile, this piece carries the elegance and innovation of the late 1960s and early 1970s, when high-frequency movements were redefining accuracy standards.

At the heart of this timepiece is the Longines Caliber 431, one of the most advanced automatic movements of its time. Beating at 36,000 vibrations per hour (vph) — a true high-beat caliber — the 431 was part of Longines’ answer to the chronometric race of the era. This movement was engineered to deliver outstanding accuracy and reliability, making the Ultra-Chron collection a favorite among collectors and precision lovers alike.

The silver sunburst dial is marked with bold applied Arabic numerals and indices, gold-tone dauphine hands, and the signature "Ultra-Chron" logo at 6 o’clock. A discreet date window at 3 o’clock adds everyday functionality while preserving the clean, balanced look of the dial.

The Ultra-Chron Caliber 431 is one of the finest examples of high-beat mechanical innovation prior to the quartz revolution. With its sleek proportions and crisp vintage aesthetic, this watch embodies both form and function. It’s a standout piece for collectors seeking a reliable vintage dress watch that holds historical and horological significance. 
 

Functions: Hours, minutes, central seconds, date

CASE SIZE:

33mm x 9.4mm thick