BLANCPAIN Ultra Slim 18k Yellow Gold 1970s

R575—an in-house designation bearing the initial “R” of Rayville, the company name under which Blancpain operated during a pivotal era. Developed using Blancpain’s proprietary modular approach, this movement is based on the Peseux 7001, refined into a distinctive expression of slim watchmaking.

The construction is simple, yet executed with precision and care. A larger balance wheel enhances stability, operating at a low frequency of 18,000 vibrations per hour. The bridges are finely finished with Côtes de Genève, emphasizing both mechanical integrity and visual refinement.

On April 9, 1928, news spread across Switzerland marking the passing of Frédéric-Émile Blancpain—a figure who had carried the family legacy since 1857 and established the brand’s global presence. His death was met with national recognition.

What followed was a turning point. The lineage that had continued since 1735 faced its end, and amid the Great Depression, the company was acquired in June 1933 by Betty Fiechter and André Léal, becoming Rayville S.A.

Determined to preserve the Blancpain name, Betty sought the involvement of Nelly Blancpain, ensuring that while the bloodline ended, the name endured.

At the same time, expansion into the American market allowed the company to navigate the economic crisis, introducing a range of models that secured its position.

The inscription “SINCE 1735” reflects this continuity—a declaration of heritage carried forward beyond its original lineage.

From the 1950s onward, this marking appeared across various dials, reinforcing Blancpain’s identity as the oldest Swiss watch brand and embedding its philosophy into every piece.

This watch embodies that legacy.

The slim case, defined by its coin-edge engraving, houses a Rayville-era movement marked with the “R” designation. Manual-wind calibers formed the foundation, with carefully selected ébauches adapted to achieve a refined, ultra-thin profile.

The dial design further distinguishes the piece, introducing elements that set it apart from contemporary offerings.

Understated in appearance, yet deeply rooted in history—
a watch shaped as much by its construction as by the story it carries.

- wrist size in our picture is 17cm circumference -