Rolex Datejust Blue dial from 1976

**Rolex Datejust 1603 – 1976

Blue Sigma Dial • Engine-Turned Bezel**

A refined and characterful 1976 Rolex Datejust 1603 featuring the rare and collectible blue sigma dial. Its rich tone, pie-pan shape, and “σ T SWISS T σ” signature — indicating gold-filled markers and hands — make this one of the most desirable configurations of the era.

The engine-turned bezel gives the watch a crisp, textured look that sets it apart from fluted models, while the solid Jubilee bracelet adds both comfort and durability, giving the watch a more substantial feel on the wrist.

Technical Background

Inside is the legendary Calibre 1570, one of Rolex’s most accurate and durable movements, praised for its reliability and long-term serviceability. Combined with the acrylic crystal, the engine-turned bezel, and the blue sigma dial, this 1603 captures the essence of 1970s Rolex design — timeless, robust, and increasingly collectible.

Tech Sheet

Reference: 1603
Year: 1976

Size: 36mm
Movement: Rolex Cal. 1570 – automatic, chronometer-certified
Dial: Blue Sigma dial (σ T SWISS T σ), applied indices
Crystal: Acrylic with cyclops
Bezel: Stainless-steel engine-turned
Bracelet: Solid Jubilee
Lug Width: 20mm
Condition: Vintage condition with attractive patina; clean dial and hands with warm aging
Warranty: 2-year warranty (standard)