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Vintage Rolex Datejust Reference 1603 Automatic 70s Blue Sigma Dial 36mm Watch

Details
Here's a vintage Rolex Datejust reference 1603 automatic with a blue sigma dial from the 70s. Keeps great time and is fully functional. Measurements include a 36mm oyster case and 20mm lug width. It's on a grey pebble-textured leather strap (Made in Italy). Time and non-quick date function at 3 a clock. Blue sunburst dial and engined turned bezel. The dial has some scratches and stains throughout, as seen in the photos. More wear around the minute track. Steel case and caseback. The lume in both the hands and lume plots aged to a nice yellow patina. Sigma markings at 6 a clock indicate. The hands and hour markers are made of gold. Drilled lug holes. Both the dial and crystal are free from any scratches or marks. All parts are original including the signed Rolex crown, dial, movement, and caseback. Both the dial and case are in great cosmetic, untouched condition.



Ready to wear!
Key Specs
History

Introduced in 1945 to mark Rolex's 40th anniversary, the Datejust was the first self-winding, waterproof wristwatch to display the date in a window at 3 o'clock. The name said everything: the date, just there, automatically.

The watch debuted alongside the Jubilee bracelet — a five-piece link design created specifically for the occasion and still one of the most copied bracelet patterns in watchmaking. Later iterations added the iconic cyclops lens, magnifying the date 2.5x directly above the aperture, a detail so practical it became a Rolex signature.

Over the decades the Datejust evolved through generations of references — from the early 1600-series with engine-turned bezels to the 1603 in yellow gold, the 16013 and 16030 two-tones of the 1980s, the 16233 and 116233 of the 1990s and 2000s — yet the core proposition never changed: a 36mm case, an automatic movement, and a date that flips at midnight.

It's the Swiss watch equivalent of a white oxford shirt. Timeless in steel, versatile in two-tone, proper in solid gold. Collectors prize the earlier sigma-dial examples for their textural richness; later smooth-dialed pieces wear as effortlessly today as they did the day they left Geneva. Few references have ever achieved this level of consistency across six decades of production.