Audemars Piguet
Audemars Piguet Royal Oak Jumbo (5402) 5402BA
The Audemars Piguet Royal Oak Jumbo (5402) (reference 5402BA) is a 39 mm 18k yellow gold watch. It runs on the automatic caliber 2121 and is water resistant to 100 m. It was made from 1977 to 1990.
Specifications
Case
- Reference
- 5402BA
- Collection
- Royal Oak
- Case size
- 39 mm
- Thickness
- 7.15 mm
- Case material
- 18k yellow gold
- Case shape
- Round
- Water resistance
- 100 m
Movement
- Movement
- Automatic
- Caliber
- 2121
- Jewels
- 36
Production
- Production
- 1977–1990
Dial versions
This reference was made with these dials and finishes.
5402BA
Multiple dial variants, some gem-set
How it compares within the Royal Oak family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 5402BA (This watch) | 39 mm | 18k yellow gold | — | 2121 | 1977–1990 |
| 15510ST.OO.1320ST.10 | 41 mm | Stainless steel | Grey | 4302 | 2023– |
| 16202XT.OO.1240XT.01 | 39 mm | Titanium and bulk metallic glass | Red | 7121 | 2023– |
| 26240BC.GG.1324BC.02 | 41 mm | White gold | Blue | 4401 | 2023– |
| 26240BC.OO.1320BC.01 | 41 mm | White gold | Purple | 4401 | 2023– |
| 26240BC.OO.1320BC.04 | 41 mm | White gold | Blue | 4401 | 2025– |
| 26240BC.SS.1320BC.01 | 41 mm | White gold | Blue | 4401 | 2023– |
| 26585XT.OO.1220XT.01 | 41 mm | Titanium / BMG | Skeleton | 5135 | 2025– |
| 26586XT.OO.1240XT.01 | 41 mm | Titanium / BMG | Pink | 5133 | 2026– |
About the Royal Oak family
The Royal Oak was introduced in 1972 with ref. 5402, a steel watch designed by Gérald Genta with an octagonal bezel held by eight hexagonal screws, a Tapisserie-patterned dial and an integrated bracelet. It established the idea of a luxury sports watch in steel.
The extra-thin 39 mm models, such as ref. 15202 and the ref. 16202 of 2022 with caliber 7121, are the direct descendants of the original. Other key families include the 41 mm Selfwinding 15500 and 15510, the chronographs such as ref. 26240, perpetual calendars such as ref. 26574 and many gold, ceramic and titanium versions. Dealers read the full reference to confirm case material and dial, and check for polishing, which can soften the case's sharp edges.
Quick answers
- What size is the Audemars Piguet Royal Oak Jumbo (5402) 5402BA?
- The Audemars Piguet Royal Oak Jumbo (5402) 5402BA has a 39 mm case, 7.15 mm thick.
- What movement does the Audemars Piguet Royal Oak Jumbo (5402) 5402BA use?
- It uses the automatic caliber 2121.
- How water resistant is the Audemars Piguet Royal Oak Jumbo (5402) 5402BA?
- It is water resistant to 100 metres.
- Is the Audemars Piguet Royal Oak Jumbo (5402) 5402BA still in production?
- No. It was made until 1990.
- When did the Audemars Piguet Royal Oak Jumbo (5402) 5402BA come out?
- It was introduced in 1977 and made until 1990.
- What is the Audemars Piguet Royal Oak Jumbo (5402) 5402BA made of?
- The case is 18k yellow gold.
Catalog facts checked October 2026.