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Audemars Piguet

Audemars Piguet Royal Oak 4100 BA

Audemars Piguet Royal Oak 4100 BA


Brand: Audemars Piguet
Typology: Vintage dresswatch
Year: 1978

Designed by Jacqueline Dimier and presented in 1977, the Royal Oak 4100 is also known as the Royal Oak Ill in the archives because it represents the third model in the collection, succeeding the 5402 and 8638. It was the first Royal Oak to be equipped with a centre seconds hand, and its aim was to win over a clientele that considered the 5402 (39 mm) to be too large, particularly in Italy, the United States and Asia. The 4100 set the standards with a diameter of 35 mm. Right from its introduction, it was avallable in steel, yellow gold and two-tone versions.

Launched in 1977, the Royal Oak 4100BA in yellow gold has been available with several dial variants, some of which are set with diamonds, in various colours (Bleu Nuit Nuage 50, gilded, white, etc.) and even in a non-guilloché version.

Our RO is in excellent condition, the case is nice and full, the bracelet taut, and the dial has sustained the passage of time very well. The charm of the deisgn of the "Genta woman" can be felt and appreciated very well on the wrist. Despite the "weight" to the eye of the noble material, thanks to its diameter and lines, it looks very elegant and absolutely not tacky. ( the bracelet fits a wrist of maximum 17.5 cm).

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  • General info

    • Reference: 4100 BA
    • Serial number: 5xx
    • Case material: Yellow Gold 18k
    • Glass: Sapphire
    • Caseback: Screw-back
    • Case diameter: 35.0 mm
    • Bezel Materials: Gold
    • Dial color: Grey
    • Dial numerals: No numerals
    • General conditions: Great conditions
    • Water resistance rate: Not waterproof
  • Band or Strap

    • Band material: Gold bracelet
    • Lug width: 18 mm
    • Buckle type: Clasp
    • Buckle material: Gold
  • Movement

    • Calibre: AP 2123
    • Movement type: Automatic
    • Complications: None