Model 25594 is a direct descendant of the Royal Oak Day Date 5572 created in 1983. Developed at the same time but presented a year later, Model 25594 adds a moon-phase aperture endowing the dial with remarkable aesthetic balance.

It proved an immediate success, with 333 units sold in 1984, and more than 600 the following year. Nevertheless, what sets this Royal Oak apart from all others is its longevity. Within the overall history of the Royal Oak, this is the only model to have remained in the catalogue for more than 20 years, from 1985 to 2006.

The 36 mm diameter places this Royal Oak at the heart of the collection. While there was a succession of three-hand 35 and 36 mm generations (4100 from 1977, 4332 from 1983, 14486 from 1986, 14790 from 1992...), Model 25594 remained very stable. Over a 25-year period, the catalogues feature less than 10 dial variations, including all materials. From a technical standpoint, Calibre 2124/2825 gradually gave way between 1997 and 2002 to Calibre 2224/2825, which equipped the last 2,000 or so watches.

Just under half of the 6,534 Royal Oak Day Date Moon Phase 25594 were crafted in steel (ST), 27% combined steel and yellow gold (SA) and 24% were produced in yellow gold (BA). Only 19 white gold (BC) watches are listed, and only one in pink gold (OR), sold in 1997.

Derived models: 25595 (1984), 25627 (1985) and 25658 (1987).

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