How did the introduction of new materials like gold accelerate the development of the Royal Oak collection? All the anecdotes about the Royal Oak journey are waiting for you on AP Chronicles (link in bio). During the first four years, the Royal Oak could only be found in 39 mm, in steel and with one dial. 1977 witnessed a major spurt with the addition of gold versions, simultaneously introducing the 5402 and 8638 models in yellow gold, white gold, and a combination of steel and yellow gold. From then on, designers’ imagination would be given increasingly freer rein, by appropriating new materials, movements, and unexpected decorative techniques. #AudemarsPiguet #RoyalOak #APChronicles 1978. Royal Oak Model 5402BA