The Rolex Ref. 2021, produced in the 1930s, stands as one of the earliest chronograph models ever crafted by Rolex. It embodies the technical and aesthetic hallmarks of its time, featuring an enamel dial, a hinged case back, and a distinctive olive-shaped single-button chronograph. This particular piece made in circa 1930s, boasts an oversized 40mm round case crafted in 18K yellow gold. It is paired with an eye-catching white enamel dial adorned with painted Arabic numerals and multi-scale indications, such as a red telemeter and a spiral tachymeter, which enhance its vintage allure.

Now surpassing 90 years, the watch remains in very good condition. The 18K yellow gold shows signs of wear and aging, a testament to its long and storied past. Remarkably, the white enamel dial is in perfect condition and the movement is clean and in working condition.

For both the seasoned collector and the discerning enthusiast, the Rolex Ref. 2021 enamel single-button chronograph is a piece of horological history and a testament to the craftsmanship of an earlier era.