Jaeger-LeCoultre 18k Rose Gold WIDE ROUND 1940-50s

There exists a caliber—measuring just 28.8mm in diameter and 4mm in thickness—that pushed the limits of what was technically possible at the time.

In 1940, LeCoultre pursued precision through chronometer-grade movements, giving rise to the small seconds caliber 449 and the center seconds caliber 450. These movements would later form the foundation for legendary developments, including the chronometer hand-wound “Geophysic” Cal. 478, and would also lead to the renowned Cal. 453, long regarded as one of Vacheron Constantin’s most celebrated calibers.

Featuring a swan-neck regulator for fine adjustment and reduced backlash, the movement is further distinguished by its gold chaton settings. At the tip of the balance cock, a uniquely shaped gold spring—both functional and ornamental—adds a sculptural presence. Every component feels not merely engineered, but composed, as if it were a work of art.

This particular piece fully showcases the excellence of the Cal. 450.
Its design answers, in the most direct way, the question of what a watch truly is.

Housed in an 18k solid rose gold case by Louis Coste & Cie, the watch carries a presence that far exceeds its size—comfortably surpassing the impression of a typical 35mm case. The dial features spherical dot hour markers at 3, 6, and 9, paired with hammer-shaped hands, all executed in rose gold. The result is a visual identity that lingers—unmistakable, and difficult to forget.

The condition remains exceptional.
The case is believed to be unpolished, showing no notable dents or damage. The dial is preserved in its original state, free from corrosion. Even the crystal—bearing fine internal hairlines formed over decades of temperature variation—appears to be the original, adding to the authenticity of the piece.

Not restored. Not perfected.
But preserved—exactly as time intended.

- wrist size in our picture is 17cm circumference -