Returning to Audemars Piguet's line-up in spectacular fashion is yellow gold. The Royal Oak debuted in stainless steel, and was the first luxury sports watch ever to be made in steel. Indeed Audemars did not produce the Royal Oak in any precious metals at all until 1977.
After an absence of some 5 years, yellow gold is back in the form of the Royal Oak Golden Age. A perpetual calendar in the grandest style.