5402ST D-Series
Royal Oak Jumbo 5402 — 5402ST D-Series
Small numbers D1000–D1410, the last lettered series. About 50 D-series cases were taken out of the run and converted into the first steel Royal Oak Perpetual Calendars (5554/25554ST).
404 sold: 1 (1978), 15 (1979), 129 (1980), 87 (1981), 70 (1982), 53 (1983), then a few to 1989. AP’s dating table gives D1000–D1500 as 1979–1985.
Identifying details
- Octagonal bezel
Eight-sided bezel around a round dial opening.
- Integrated bracelet
Metal bracelet designed as one with the case.
- Date
Date display.
- AP monogram at 12 o’clock
Applied “AP” monogram below 12 o’clock, adopted for the 5402 from 1977 so the hour hand clears the logo.
- Petite Tapisserie dial
Guilloché grid of small truncated pyramids (Stern’s “T21” pattern), the original Royal Oak dial.
Variants of 5402
Reference overview →| Variant | Production |
|---|---|
| 5402ST A-Series | 1972–c. 1976 |
| 5402ST A-Series · Steel bezel screws (earliest examples) | c. 1972 |
| 5402ST without small number (Intermediate series) | 1974–c. 1976 |
| 5402ST B-Series | 1975–c. 1977 |
Case & movement
- Reference
- 5402
- Production
- 1979–c. 1985
- Case serials
- c. 1,000–1,410
- Case material
- Stainless steel
- Case diameter
- 39 mm
- Water resistance
- 100 m
- Crystal
- Sapphire
- Movement
- Automatic
More specifications (2)
- Date
Movement
Audemars Piguet 2121
Date version of the 2120, introduced in October 1970 in model 5381 and chosen for the first Royal Oak in 1972; at the time the thinnest automatic with central rotor and date. Ébauche from LeCoultre & Cie until about 2002, then made by AP; replaced by the 7121 in 2022.
Automatic · Introduced 1970 · 19,800 vph · 36 jewels · 40 h reserve · Ø 28 mm · 3.05 mm thick