Maker: Audemars Piguet
Model: Royal Oak
Reference number: 5402BA
Serial number: B18960-173929-00122
Caliber: 2121C
Year: Circa 1970s
Case size: Approx. 39 mm
Case material: 18K yellow gold
Dial: Champagne 'Tapisserie'
Movement: Automatic
Calibre: 2121/1
Bracelet/Strap: 18K yellow gold
Functions: Date
Stamps: Case back: Royal Oak No 122. Bracelet: AP SWISS MADE AUDEMARS PIGUET & CO SWISS (AP maker's mark) 750.
Gross weight: 108.05 dwt.
Sold with: AP Extract from the Archives

The Audemars Piguet Royal Oak 5402BA is a rare, vintage 39mm "Jumbo" luxury sports watch launched in 1977 as the first solid 18k yellow gold version of the iconic Gérald Genta-designed 5402 series. Produced in limited numbers (approx. 736 units) between 1977 and 1990, it features a 18k yellow gold case, integrated bracelet, and the ultra-thin automatic Calibre 2121.