4100BA
Royal Oak III 4100 — 4100BA
1977–c. 1988
Yellow gold with several dials – Bleu Nuit, gilt, white, some diamond-set, and a plain non-guilloché version.
2,130 sold 1977–1988.
Identifying details
Variants of 4100
Reference overview →| Variant | Production |
|---|---|
| 4100ST | 1977–c. 1987 |
| 4100SA | 1977–c. 2002 |
| 4100BACurrent | 1977–c. 1988 |
| 4100BC | 1981–1986 |
Case & movement
- Reference
- 4100
- Production
- 1977–c. 1988
- Case material
- 18k yellow gold
- Case diameter
- 35 mm
- Water resistance
- 50 m
- Movement
- Automatic
- Date
- Yes
- Caliber
- Audemars Piguet 2123
Dial, bezel & hands
Unknown attributes are left out rather than guessed.
Movement
Audemars Piguet 2123
26 mm automatic with centre seconds and date on a LeCoultre ébauche (900), made for the 35 mm Royal Oak 4100 – the first Royal Oak with a seconds hand. Revised in 1979 as the 2123/1; just under 9,000 made 1977–1984.
Automatic · Introduced 1977 · 28,800 vph · 33 jewels · Ø 26 mm · 3.25 mm thick