Sigma Dial
Datejust 1601 — Sigma Dial
c. 1970–c. 1979
Two small σ symbols flank “T Swiss T” below six, marking solid-gold hands and indexes. Used from the early to the late 1970s, occasionally late 1960s. Example: matte white, circa 1972 (Antiquorum, case 3,042,423).
Case suffixes (per Wristler): /4 steel with white-gold bezel, /3 steel and yellow gold, /8 yellow gold, /9 white gold, /5 rose gold.
Identifying details
Variants of 1601
Reference overview →| Variant | Production |
|---|---|
| Pie-Pan Dial, Luminous Plots | Undated |
| Glossy Black Gilt Dial | Undated |
| Glossy Black Gilt Dial · Tropical | Undated |
| Linen Dial | Undated |
Case & movement
- Reference
- 1601
- Production
- c. 1970–c. 1979
- Case diameter
- 36 mm
- Water resistance
- 100 m
- Crystal
- Acrylic with Cyclops lens
- Movement
- Automatic
- Chronometer
- Yes
- Date
- Yes
More specifications (1)
- Caliber
Movement
Rolex 1570
Same architecture as the 1560 at a higher frequency. Gained hacking seconds in 1972 without a change of designation.
Automatic · 19,800 vph · 26 jewels