24-Hour Dial
Oyster Perpetual Bubbleback 3131 — 24-Hour Dial
Undated
Dial with an added 24-hour scale. Seen as a pink dial with luminous numerals in 14k pink gold (circa 1946, with a South-American “C” import stamp on the lug) and as a black dial in yellow gold.
No verified image of this watch yet
Identifying details
Variants of 3131
Reference overview →| Variant | Production |
|---|---|
| 24-Hour DialCurrent | Undated |
| Centigraph Dial | 1946 |
| Rose Two-Tone Dial, Roman Quarters | 1947 |
Case & movement
- Reference
- 3131
- Production
- Undated
- Case diameter
- 32 mm
- Movement
- Automatic
- Caliber
- Rolex 9 3/4''' Perpetual
Dial, bezel & hands
Unknown attributes are left out rather than guessed.
Movement
Rolex 9 3/4''' Perpetual
The 9¾-ligne self-winding base behind most bubblebacks, signed Rolex and fitted with the Superbalance in many lots. Antiquorum names the 620 as one version of it: designed in 1936 and in regular production from 1940 to 1951.
Automatic · 17 / 18 / 19 / 20 jewels