The Audemars Piguet Royal Oak was a revolutionary design in the world of luxury watches when it was launched in 1972. Initial price was very expensive, about ten times the price of a Rolex Submariner at the time, the Royal Oak was not well received due to its high price. However, over time, its unique design gained popularity and became the highly sought-after watch it is today. The Royal Oak 15500 series showcases a fusion of classic and modern elements. The octagonal case and exposed screws are bold and easily recognizable. The design is inspired by the portholes of ships, symbolizing strength and toughness. The series is known for the Tapisserie pattern on the dial, complemented by hour markers and smooth hands.

The dial layout of the 15500 series is designed for optimal readability and beauty. The "Grande Tapisserie" pattern adorns the dial, with widened hour and minute markers around the outer edge. The calendar display at 3 o'clock has also been carefully designed to enhance the overall visual experience. The absence of the "AUTOMATIC" text at 6 o'clock further adds to the clean and uncluttered look.