Rolex Datejust 1601 oyster

The “Sigma” dial signature, identified by the small σ symbols flanking “SWISS” at 6 o’clock, is a subtle but important detail introduced by Rolex in the early 1970s. Its purpose was to certify the presence of solid gold components on the dial—typically the hour markers and hands—at a time when Rolex was quietly emphasizing material quality over overt branding. Today, Sigma dials are highly sought after by collectors for their short production window and understated significance, marking a very specific era in Rolex history.

This Rolex Datejust Ref. 1601 with Oyster band and Sigma dial, serial 3.8xx.xxx, dates to the mid-1970s and represents one of the purest expressions of the classic Datejust. The pie-pan dial layout, combined with applied gold markers, delivers depth and elegance without excess, while the Sigma signature adds a layer of collectability appreciated by seasoned enthusiasts. The dial shows a coherent vintage character, with aging consistent with the watch’s age and no visual discord between markers and hands.

Housed in a 36 mm stainless steel case with a fluted white gold bezel, the 1601 strikes the perfect balance between sportiness and refinement. Inside beats the legendary caliber 1570, one of Rolex’s most robust and respected movements, known for long-term reliability and precision. This example has been fully serviced in December 2025, ensuring mechanical integrity while preserving its vintage identity. A true classic Datejust: timeless, wearable, and increasingly difficult to find in honest, well-maintained condition.