Audemars Piguet Royal Oak Day-Date Moonphase 25594BA

Audemars Piguet Royal Oak 25594BA — Smooth Dial Rarity, 1986 Original

This isn’t just a Royal Oak — it’s a rarely seen configuration of one of Audemars Piguet’s most underappreciated vintage complications. The Royal Oak Day-Date Moonphase 25594BA, cased in solid 18k yellow gold, combines Genta’s iconic design with practical functionality — and this example is elevated even further by a smooth, non-tapisserie dial, one of the rarest factory variants ever produced.

Dating back to 1986, and confirmed by an Extract from the Archives, this reference balances complexity and clarity, featuring a dual time subdial, power reserve indicator, and pointer date, all laid out with precision and symmetry. The absence of the traditional guilloché pattern gives the dial a sleek, almost minimalist tone — highly unusual for the period, and incredibly desirable among collectors.

At 36mm, the case retains the refined proportions of the early Royal Oak lineage, and the full gold construction gives the watch unmistakable presence without shouting.

The 25594 remains a sleeper hit in the Royal Oak family — but with a smooth dial and early production, this piece belongs in serious collections.

Royal Oak 25594BA: Genta design, gold case, and one of the rarest dials Audemars Piguet ever made.