This Datejust features the highly collectible Sigma dial, marked by the small σ symbols flanking “T SWISS T” at 6 o’clock. Introduced in the early 1970s, these subtle marks indicate the use of solid gold hour markers and hands rather than plated components—part of a Swiss industry effort to highlight precious metal content during the quartz era. Produced for a relatively short period, Sigma dials are prized by collectors for their historical significance.
Movement: Automatic
Case Size: 36mm
Ref Number: 1603
Strap: original jubilee bracelet
Production Year: 1973
Made in Switzerland
Box/Papers: watch only
Condition: Very good vintage condition. Signs of wear consistent with age